In java service how to get java.sql.Connection created in IS

Do you let the engine control your car or do you drive it yourself?

Back to topic: I found the com.wm.app.jdbc.* library and the com.wm.app.b2b.server.* library with JDBC-related classes. While the latter is documented, it doesn’t seem to allow access the connections of the JDBC adapter package. Unfortunately, I couldn’t find any documentation on the former. Any hints?