Help ID'ing Part

http://i9.photobucket.com/albums/a85/quick_dodge2/HPIM2290.jpgWhile I was working on my blown fuse issue, I came across a set of wires along the rear bumper that was causing the short. I followed the wires to a connection of some sort. Looks like an aftermarket trailer wiring harness? The connection was just sitting unattached on part of the hitch. I honestly never noticed it until today. It doesn't look OEM. Part of it has actually melted. The previous owner said the towed his boat but there was no trailer harness set at the OEM hookup near the jack.
http://i9.photobucket.com/albums/a85/quick_dodge2/HPIM2288.jpg
http://i9.photobucket.com/albums/a85/quick_dodge2/HPIM2289.jpg

looks like someone spliced in the trail wires into your main harness.

looks like someone spliced in the trail wires into your main harness.

That's what it looks like.

What are the benefits going this route instead of using the OEM plug? Obviously I know nothing about towing. :disappoin

I might replace the melted connector b/c I plan on towing a small u-haul trailer this summer.

No benifit over the OEM style. In fact the OEM style has the edge since its much easier to install and you dont hack up your wiring. Since that one is already in place though, and if it still works right, you might as well just replace the plug on it.