...style plug its the heavy duty one 7 prong with the round plugs on it and it doesn't fits my trailers I noticed that one of the prongs wasn't hooked up, and I'm trying to put a new one in and I took it off and it only has 6 wires to it and another wire that is capped off like it looks like a button but not sure. It's a green wire.

And all the wires are not the standard wired there different colors than the typical wires iv found and there is no white ground. Any ideas would be great