This is a mini pinout that complements the “Ultimate Mini Nintendo NES Cartridge Keychain Pack” . I jokingly made a comment about using old ram sticks for the pinout inside the cart, but instead I opted to design a pinout that closely resembled some disassembled original NES cartridges I found online.

Print and apply small dabs of glue on the back side. Carefully use tweezers to place on the back cartridge. Make flush with bottom of cart, and use the static opening force of the tweezers prongs to put pressure on the mini pinout print.

I used matte dark green for the PCB and silk gold for the pins.