Summary

This is meant to be an enclosure for the "Triple Controller - Classic Gaming USB Adapter" found here: https://www.tindie.com/products/timville/triple-controller-classic-gaming-usb-adapter/

There are three flavors depending on what Arduino you are using: Micro USB, USB-C (Ali Express) and USB-C (Sparkfun). I've included STEP files if you'd like to make any changes.

It's been tested with the following controller connectors:

NES:
OEM NES Controller
8BitDo N30 2.4G Receiver
8BitDo NES Retro Receiver

Genesis:
OEM Genesis 3-Button Controller
OEM Genesis 6-Button Controller
8BitDo M30 2.4G Receiver
8BitDo Genesis Retro Receiver
Krikzz Joyzz

SNES:
OEM SNES Controller
OEM SFC Controller
8BitDo SN30 2.4G Receiver
8BitDo SNES Retro Receiver

If you find a controller type that doesn't fit please let me know!

You may need some supports for the bottom screw holes, but that's it. You will also need 4 M2x16 panhead machine screws or 4 M2x20 self-tapping panhead screws.