A few weeks ago I posted here about a cheap Wii SCART "RGB" cable I had bought off eBay that refused to send an RGB signal to either of my CRT TV-s.
Since I opened up the cable and saw that there were seemingly enough wires in it (almost identical to the shots on this page where the thing eventually worked), I refused to just give up and started to google about Wii, SCART, RGB etc, looking for a solution.
Thanks to pages like these I was able to see that almost everything in my cables was wrong. The only things that were "right" on either end of the cable were the two audio channels and composite video. However, since it did have all those other unused wires in it, I decided to try to "fix" the cable.
I mapped out my faulty version of the cable, wrote down which ends had to be moved (which wire needed a resistor, and so on), and ordered some basic soldering equipment. The stuff arrived today and I'm happy to say that after my very first soldering session I now have a working Wii SCART cable that successfully sends an RGB signal to my TV (both TV-s recognise it as RGB).
Good job on the scart! I noticed my cheap 3rd party Wii scart looked like composite on my crt and wouldn't sync properly with the OSSC, I didn't do much testing but makes sense it's probably wired incorrectly.