First I would like to say thank you to the entire tech element of the SRK/FGC. This site (along with slagcoin and Youtube videos, most of which I’m betting have their roots here) has been an invaluable resource for learning.
So, here’s where I’m at:
I picked up a WiiU TTT TE stick on clearance from Madcatz with the intention of playing Wii/VC games and PS2 (additional classic consoles and pc are a bonus). After doing tons of research here (and everywhere else I could find useful information), I decided to go with a Cthulhu MC RJ45 setup (360 compatibility is a non issue, I’ve already Sanwa modded a Brawlstick for that), which I would like to dual mod in order to keep the Wii cable. In the worst case scenario I, could easily gut the Wii PCB and use the Cthulhu’s RJ45 Gamecube compatibility (with a mayflash GC to Wii adapter if needed, at extra cost), so I have a fallback plan. I definitely need more practice soldering (the soldering needed for Cthulhu RJ45 looks to be well within my capacity), so I’m looking for the least destructive/invasive means possible, which lead me to the terminal method. I haven’t dug enough into piggybacking the PCB’s directly to feel like I understand it on the level needed to attempt it.
This is a rough MS paint sketch of how the TE is currently wired, minus the ribbon cables going from the terminal strips to the Wii PCB:
…And here’s the plan I have. Disregard the lack of details or accuracy on which buttons the Cthulhu wires are going to, this is simply to illustrate the concept. I’ve also left out the RJ45, as the drawing is already a mess, and I feel confident I know what needs to be done there:
The assumption I’m making is that one whole strip of the terminal must be going to ground, so in theory I should be able to bypass setting up a daisy chain ground. If this is correct, which strip is ground (closer or further from the mounted ribbon cable)?
My next questions are on wiring the stick itself. Looking at the bottom of the JLF, one odd looking post(?) on each corner says “NO”, and the other says “COM”. All the diagrams I’ve studied on wiring these sticks use a signal and a ground wire for each direction rather than the wiring harness. If these posts are what I’m supposed to attach the Cthulhu wires to, which of each set is ground? Would I be soldering directly onto them? Would I be better off peeling a section of the wiring harness apart and splicing to the Cthulhu, then relying on the existing JLF ground? I ordered an extra JLF harness just in case things get messed up.
Finally, I’ve read over and over that both boards must have power when dual modding, despite the fact that I won’t be sharing a cord with this setup. Looking at where the Wii cord attaches to a small PCB underneath the main Wii PCB, I see a red wire (which I know is the power wire for USB) separated by one empty space from the rest of the cable wires. Is this a suitable location to connect the Cthulhu for power? If nobody knows for sure, what do I need to do to find out?