Hi everyone, I had a setback on my nitrous installation (broken side motor mouts), anyhow I replaced all 4. So I'm trying to finish up my nitrous install but I cant find a tach signal wire for the rpm window switch. I've read all the posts on Pin 43 but the GTS ECU doesnt have a wire on Pin 43, in fact the connectors look like they have different pins. Am I looking at the damn thing wrong or something? Help? Since this is just for a window switch and not a piggy back computer can I use a different signal? Underhood is ok too.