Just finished installing my Prodigy brake control. It took a couple of hours but was very straight forward. I used their generic wiring diagram. I purchased a 25 foot 12-3 drop cord to go from the battery
through a breaker, then to the control finally to the trailer plug. I ran the wire under my Saturn Vue's chassis and I think the drop cord will hold up well. Sure is easy to spot with its bright orange color. (plus they are really cheap these days) I paralleled two conductors from the control to the hitch to lessen voltage drop, since there is an extra wire.
Now to check the brakes
on the trailer, hitch up and get the whole calibrated.
Someday I might get to go camping.