I ordered a panel mount 15 amp CB after doing some rough math on power demands. I then drew up a electrical power subsystem circuit diagram.  I removed the Jetson TX2 dev kit from its plastic base some time ago. It ended up being the perfect material to hold the CB, switches, indicator LED's and a extra digital voltage monitor that I will likely wire to a momentary push button. (got to be power efficient right? no vampire current draws here...) Below is a small snap shot of progress. It is temp halted waiting for the parts to arrive. 

Not shown in the diagram is the 3rd switch to toggle the TX2 power and additional automotive fuses for the 12volt rail.