I recently got a 1985 Yellowstone 27' 5th. I have a GMC Sierra which has a "6 way" wiring harness. The cable that came with the 5th has a 7way plug on it for the truck end and the trailer end. It also has a 6 way connector in the middle for some reason. Sounds like a mess I know. My main questions are: If the 5th has a 7way receptor does that mean it was wired for a 7 way (usually) ? And should i take the 6 way connector out completely? When I pulled it home, I had brake and tail light on the right side only. No running, or backup lights. Any suggestions are greatly appreciated... Thanks Everyone!