What is this? Electric Box on 95' Electric DS

[Dustinboyd]

I've searched but it's hard to search when I don't know what this thing is. I'm just curious if anyone knows. It's a 95' Electric Club Car DS. I'm wondering what this box is by the rear of the battery bank, mounted to the frame. It's got two wires coming out of it, a black wire and a grey wire. The grey wire ends up turning into a red wire that has in inline fuse, which may be for the headlights. They are aftermarket headlights, I think. I don't know where the black wire goes. Sorry the description sucks but I don't really know how to better describe it. Pictures are included to help. Does anyone know what this is? Thanks!