Little bump here for probably a noob question (sorry :/)
I'm attempting at doing this mod with the SuperPad 64 (by Performance) same one as the black one in the picture above. When rewiring the GC c-stick to the super pad, is it ok to just rip off the 4 white wires that connect the C-stick board to the main GC controller board? And then just solder the wires from the superpad onto the bottom of the C-stick board?
Also my superpad looks like it's wired kind weird when I compare it to other diagrams I've seen on here... the VG1 (ground) black wire is attached to the one edge of the y axis, and instead of the wire branching off, it has a separate small wire that is soldered to the same pin, and then the other end to the x axis. Will this change anything when I have to rewire the c-stick to it or do I do it exactly how it looked when the superpad stick was attached?
I cut the octagonal plastic guide that goes around the original stick so that there's no middle piece - just the octagonal guide for the joystick and used a bit of krazy glue to fix it onto the front of the controller casing and fixed the z-button that broke years ago.. I just need to find a GC controller now to get the c-stick out of and figure out how to hold it all inside and remount the Z button. I went to the nearest Gamestop earlier today and bought a used 3rd party GC controller that looked fine... it had a turbo button on the front and i plugged it into my cube and it doesn't even work

..... buttons only work when the controller is tilted a certain way and the sticks dont work at all so now I gotta go back there tomorrow and probably pick up a Nintendo brand used one probably.. but gonna make them test it before selling me a piece of junk that doesn't work. Anyone done this mod with sticks from 3rd party GC controllers?
Thanks.
Yes remove the 4 white wires.
The Official gamecube analog stick has those extra separate wires already built in to the board. So you don't need to add those wires, just wire the 4 wires coming from the SuperPad to the same places on the GC analog stick as they were on the Superpad analog stick.
Third Part Gamecube sticks "should" work just fine.