mystery wires

1) There are two cable TV hookups on the outside. They come in through the water heater compartment. One's an orange cable and the other is a larger white cable. They both appear to be RG6. They go through the fridge compartment and up into the wall. There are no visible switches or anything. There is a switch for the antenna booster, and it functions as expected, pulling in strong local signals. The only reason I could see why someone would want two is if they wanted to hook up to campground cable and also have a satellite antenna. But it seems like there would need to be a switch somewhere to make that work. Since the TV works and since we probably won't be camping anywhere with cable I probably won't worry about it, but I'm curious.

2) There are two fans installed on the back of the fridge. The power wires for the fans come up over the fridge. I'm thinking there must be a switch somewhere. Maybe I need to pull out the fridge to see where they go.

3) Most troubling mystery. There is a bare white wire in the bundle that connects to the multi sensor (between the sink and the stove). I can see that at one point it had been connected to something. Everything seems to work. White is supposed to be ground, so I'm thinking for now just putting a wire nut on it to keep it from shorting something out.

4) There's a coil of red wire on the tongue. It appears to be screwed to the frame, so I guess it's a ground wire. I've never heard of a separate ground for a trailer frame. The other end has a Y fitting for a screw.

This may have something to do with that 'Solar on the side' connection. Test for power first, them ohm it back to the 'on-the-side' port. Previous owner my have never used and just taped it up out of the way.

If anyone has any ideas on sorting this stuff out please let me know.