I bought a GC+ off a friend when they we're in stock a while ago. I'm trying to wire it up now but I can't seem to get it working. I'm trying to solder a GCC cable to it so I can use it on a Wii U. Do you guys solder to the 5v, D, 3.3v, and GND contacts or to the 6 holes at the top? If it's the...