Originally Posted by wahoonc
Got a picture of the plug end of it? Looks a lot like a plug for the exterior solar connection, though the wire gauge looks to be a bit light for that. Given the colors it is some sort of power adapter.
My trailer IS pre-wired for solar so that might be a good answer. I didn't take any pictures of the plug end but I will do that the next time I'm out or try to stop by my dealer and ask but, the solar does seem like the right track.