I have these guts from a MAS Systems Super Pro stick I removed years ago when someone bought it off of me for use with their Neo-Geo.
The PCB is working and is very easy to use with convenient places to solder your wires in place.
This has some historic value to it as well seeing how Super Pro Sticks were the de facto standard for serious fighting game players until the advent of Japanese joysticks taking over in the mid 2000s. If you're restoring a Super Pro Stick to factory parts this is useful.

