A wiring harness suitable for adapting pretty much any joystick so it will plug into a 5-pin joystick harness. This is especially useful if you are upgrading a joystick in a console or deck and your new joystick (such as a Sanwa JLW or Zippy) won’t interface to a 5-pin harness.
They are simple to install – all you need to do is attach the connectors to the joystick’s microswitch terminals, then just plug the male end into the 5-pin harness.