Should be simple then. You need:
Wire cutter/stripper/ terminal crimper.
5 feet of Wire and a 2 quick disconnects per button plus 5. (maybe less if you can reuse the ground daisy chain. If the Hitbox button wires are really long you may not need these)
- Cut the usb cable maybe 6 inches from madcatz fightpad. Save the USB cable.
2.Take the cut end of usb wire attached to Madcatz pad.
Carefully with hobby knife, strip off an inch of the outer insulation and nip or cut off shielding braid to reveal 4 usb wires. Black, Red, White, Green.
3.Link the USB cable of the Pad to the ChImp. Strip a quarter inch off each of the 4 wires to expose wire.
Black wire goes to GND, Green goes to XD+, White goes to XD-, Red goes to VCC
- Dual mod the signals. Now if the signal wires in the hitbox are long enough you can cut and strip them in the middle and stuff them into the Chimp SMD.
For example button A. You will need to find button A on the madcatz pad. cut the wire so it can be stripped and screwed into the A terminal of the chimp. Before you do that you should have a wire with a quick disconnect on it that can reach the button. Strip the end of both these wires and screw them into the A screw terminal.
Repeat. For all buttons (including directions that are now buttons)
You can take the ground wire should be a daisy chain set of quick disconnects. Cut it close to the PCB strip it and insert it into a free GND terminal. Because you aready connected the Madcatz GND via USB cable in step 3, you don’t need to do it like the signal buttons.
Strip the outgoing USB cable like step 3 but screw red into VCC, white to OD-, green to OD+ and black to GND.