[Patrice] hacked all of his classic controllers for use when playing games on an emulator. He made the base station starting with a USB gaming controller. From there he soldered wires connecting the PCB pads for all of the buttons to the pins of a d-sub connector. The same is done on the classic controller, allowing him to switch them out at will. If you do the wiring correctly you only need to configure your emulator buttons once. This is a lot easier than trying to find and use classic controller connectors but you do have to alter that vintage hardware.