SAP DI server wsdl

Hello,

For one of our clients, we need to refactor the connection with the SAP DI server.
now our old code uses "Interop.SBODI_Server.dll". but we do not want to use this anymore.
for the new solution we would like to connect to the SOAP using our own soapclient.

the issue is that I cannot find how SBODI_Server determines the endpoint url or wsdl.
we use the interact method to send an xml.
the only thing I can find is that the LicenseServer tag is filled with: "127.0.0.1:30000" but using this url gives me a timeout.
So my question is, how does this dll determine the specific endpoint to connect to?
thank you.