I've started cutting foam for my battle rifle, and I want to have a backlit ammo counter (my first build with an electrical component; figured I'd try it before deciding how complicated I want to be with fitting electronics in my armor) but I'm having a hard time finding a place to put the power pack I'm using. It's an Adafruit button battery pack that I picked up at Microcenter; 2 2032 batteries, with a 4-6" cable connecting to the socket, into which the bulb is directly plugged. The pack is low profile, so I've got an advantage there, but I'm not sure where on the gun to store it discreetly. Thoughts?