When I saw your post, I checked our new 2209 because, when I checked the roof a week ago I noticed that it must have had a factory solar panel on it as there were the sealed up mounting places on the roof and the solar regulator is in the back of the fridge, where the factory puts it and it is wire up. No idea what happen to the panel. I plan on getting one also. Any way I would say the wires come down through the cloth covered bundle in the back next to the vent pipe, then into the storage area, then past the back of the toilet, then under the tub and then into the cabinets under the sink as there is a wire bundle in the back, then into the back of the fridge where the regulator is and on through to the battery. Yours probably is covered with panels like the 2209 is, you will have to remove some of them to get the wires through. The 1995 Tow-Lite we have would be easy as there is no paneling in the rear closet or behind the toilet and I can see that is where the wires are ran from the top half. It will be some work but I wouldn't want the wire exposed either. I didn't find the wire in the 2209 either, will have to check the color of the wire at the regulator and then fine it in the rear bundle, as they must have pushed it down into the roof area and then sealed the hole up.
As you can see I like to talk, to much time on my hands I guess. But at my age a 2 hr. job takes 2 days. Hope this helps and good luck.
