12v Field Battery Box Plans and Parts

This is the new 12v field power box I built for my astronomy rig. I thought I would post the parts list and plans in case anyone was interested in building one of their own and had no idea where to start. Please proceed at your own risk.

Main components:
1 x Monoprice Weatherproof Hard Case with Customizable Foam, 12" x 10" x 8"
1 x Sealed Waterproof LED Rocker Toggle Switch SPST Marine 12V Panel Mount Round Red
2 x Red LED Round Digital Display Dual Volt/Ammeter Car/Truck/SUV
1 x DRO