I added a fuse box in case I add more electronics in the future. I'm surprised at how long it too to put all of this together. I've spent many, many hours on this switching system.
I don't know where I'm going to mount this unit. And, by the way, I've already purchased some bed liner paint. Some day, when the temperature is at least 70, I will put paint the truck bed. For now, it can hide under the Tonneau cover (which I also need to waterproof).