The Bargman harness contains leads for marker/tail lights, stop/turn lights, and backup lights, as well as a hot and a ground. The challenge was to be able to turn on the marker/tail lights at the campsite as a "Lazy Man's Tacky Lights", and also to be able to light up the area behind the camper. Also, if the camper had to be left on the roadside, it would be desirable to be able to turn on emergency flashers. The answer was this small, cheap ($5), plastic toolbox from Lowes. While the box was cheaper, everything else was not...