Creating Conduit & Node Network Types

Hello,

I have a structure that will have both communication and electrical conduits connected to it. Unfortunately the different Network Types within the feature definitions do not let this happen. Can anyone point me to more information regarding Network Types within Subsurface Utility Feature Definitions? I'd like to make a generic network type that I can use that will connect to all utilities, but I am not sure where those definitions are housed within the SUE Dgnlib.

Thanks for any information you may have!