Remove the bottom of the X-arcade, remove the quick dissconnects from the controls you want to use (both NO and COM terminals, make sure you make a note of each wire too) and run new wires with disconnects from the microswitches to your JAMMA harness. You will need to do a new ground loop from the controls to the JAMMA harness too.
If you use this method you can easily change it back to a normal x-arcade by simply plugging in the original quick disconnects.
You may also need to make a hole in the x-arcade base/back panel to run the wires through.
