Azure API Manager - SOAP pass-through - Base URL and WSDL - Spring Boot

I am trying to make a successful call from my "Spring Boot Application" to a SOAP API on the "Azure API Manager".

I have defined a WSDL

    <?xml version="1.0" encoding="UTF-8"?>
    <definitions xmlns="http://schemas.xmlsoap.org/wsdl/"
                 xmlns:xs="http://www.w3.org/2001/XMLSchema"
                 xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
                 xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/"
                 xmlns:tns="http://www.dataaccess.com/webservicesserver/"
                 name="PutMessage"
                 targetNamespace="http://www.dataaccess.com/webservicesserver/">
      <types>
        <xs:schema elementFormDefault="qualified" targetNamespace="http://www.dataaccess.com/webservicesserver/">
          <xs:element name="PutMessage">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="message" type="xs:string"/>
              </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="PutMessageRequest">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="message" type="xs:string"/>
              </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="PutMessageResponse">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="PutMessageResult" type="xs:string"/>
              </xs:sequence>
            </xs:complexType>
          </xs:element>
        </xs:schema>
      </types>
      <message name="PutMessage">
        <part name="parameters" element="tns:PutMessage"/>
      </message>
      <message name="PutMessageSoapRequest">
        <part name="parameters" element="tns:PutMessageRequest"/>
      </message>
      <message name="PutMessageResponse">
        <part name="parameters" element="tns:PutMessageResponse"/>
      </message>
      <portType name="PutMessageSoapType">
        <operation name="PutMessage">
          <documentation>Returns the feedback by AzureServicebus when a message is pasted into it.</documentation>
          <input message="tns:PutMessageSoapRequest"/>
          <output message="tns:PutMessageResponse"/>
        </operation>
      </portType>
      <binding name="PutMessageSoapBinding" type="tns:PutMessageSoapType">
        <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
        <operation name="PutMessage">
          <soap:operation soapAction="" style="document"/>
          <input>
            <soap:body use="literal"/>
          </input>
          <output>
            <soap:body use="literal"/>
          </output>
        </operation>
      </binding>
      <binding name="PutMessageSoapBinding12" type="tns:PutMessageSoapType">
        <soap12:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
        <operation name="PutMessage">
          <soap12:operation soapAction="" style="document"/>
          <input>
            <soap12:body use="literal"/>
          </input>
          <output>
            <soap12:body use="literal"/>
          </output>
        </operation>
      </binding>
      <service name="PutMessage">
        <documentation>The Web Service, to interact with azure service bus.</documentation>
        <port name="PutMessageSoap" binding="tns:PutMessageSoapBinding">
          <soap:address location="https://www.dataaccess.com/webservicesserver/numberconversion.wso"/>
        </port>
        <port name="PutMessageSoap12" binding="tns:PutMessageSoapBinding12">
          <soap12:address location="https://www.dataaccess.com/webservicesserver/numberconversion.wso"/>
        </port>
      </service>
    </definitions>

And uploaded the WSDL to the Azure API Manager.

Spring Boot SOAP CLient

Further

• I have generated WebServiceFactory inheriting from jakarta.xml.ws.Service
• and WebService "PutMessageSoapType" annotated with @WebService

So that I am now set to call the SOAP API.

    PutMessage_Service putMessageService = new PutMessage_Service();
    PutMessageSoapType myWebService = putMessageService.getPutMessageSoap();

    PutMessageRequest putMessageRequest = new PutMessageRequest();
    putMessageRequest.setMessage("");
    myWebService.putMessage(putMessageRequest);

Question:

what I fail to recognize is

how to point the Spring Boot SOAP Client to the Base URL https://alfdevapi5-example-apim.azure-api.net/suffix1 of the Azure API Manager API?