If it's the matter of running the cable, get a tool called a "fish tape" from Harbor Freight or Home Depot. It should help you run the cable between the wall and whatever else you need to run it through.
4 whopping cylinders on Toyota RV's. Talk about great getting good MPG. Also I have a very light foot on the pedal. I followed some MPG advice on
Livingpress.com and I now get 22 MPG! Not bad for a home on wheels.