Hi, twelch, I have a quick question for you: I'm also doing that install and need to splice in the RCA cables to the pre-amp sub wires. The problem is that for each cable, there is a + and minus. So there are 4 total wires for the RCA's, and then only two pre-amp sub wires. Do you remember...
This is brilliant--thanks so much for your write-up! Do you by chance have any additional pictures of what you described that you did for the 18-pin connector? I'm going to try and do the same for the 24-pin connector, as like you, I have searched far and wide for the harness, and it doesn't...