Alright I know there's a how-to but it's posted by a GT owner, I have a ST, different location to run the rev wire,(green)? I'm confused as to where to run this wire. Is there a easy splice that will give me input. Maybe I over looked the toyota box described, but still not enough info and the pic doesn't help at all? what color is the wire I'm splicing into? Need help, want tach installed!