I finally made some progress on the build!! Mounting all the parts was tricky. I wanted the pack to be rugged and found some good solutions.
I added the light and wired up the switch and batteries. I couldn’t find anything to put the batteries in but found a tupperware piece at Target that works great.
I mounted the light and wired the battery box
Lit up without the grill
Lit up with the grill
3/4 view unlit
3/4 view lit
Here’s the pack in action!