We own a 2002 Georgetown on which the crank-up roof vent had seen better days. I decided to replace it with a Maxxair Maxxfan for the extra circulation that it would offer. When I removed the old roof vent I was pleasantly surprised to find a brown and white wire pair there, together with a 5-wire signal cable and a 110V cable. In essence, it looks like wiring for a roof air conditioner but there are already 2 A/C units there. Can anyone shed light on what these are for? I'd like to use the brown/white pair to power the fan if possible.