Hitch wiring

[djpierce]

I just got a Bambi 19' and am trying to wire up the trailer hitch. I followed the manual but was concerned about one thing. The +/- 12 volt pins on the trailer are hot. I wired my tow vehicle to the same pins. So it is hot at the tow vehicle connector. My question is why is the trailer hitch hot and do I really need the tow vehicle connector to be hot too?
I am a bit concerned about plugging two hot connectors together.

[TG Twinkie]

The UCord on the trailer is wired in such a way that the "house battery" will be charged as you drive down the road.
As long as the + and - 12 volt match. All will be fine.