Somone had asked for a photo of the rear lamp installed - you can see the simple flat stock adapter plate. We used a Home Depot bracket as a donor and the M37 bracket as a drill template. The c-t-c distance between the holes is 1 1/4" which allowed the lamp to move down and clear the interference to the truck bed.
Here also is a shot of the rear back up LED lamps installed up underneath.
Gama Goat lights fit perfect & work well with the exception of 1 problem. The lense has a plastic housing that is notorious for cracking due to UV exposure. I have them on my shop truck, you can count on a lense replacement at least annually. Some early versions had a metal lense housing which does great no problems, but are next to impossible to find these days. If you are using the ones with a plastic lense housing, I would suggest looking hard at composite lights instead. I have some composite lights that have a 100% metal housing that I intend to put on mine as soon as time permits.