I was wondering about the installation of the safc2 in my 88 supra. The wiring diagram for it (T2-b) shows a place for rpm1 and then another one for rpm 2. Yet where it describes for karman ecus in which wire to use for what it only says green wire goes for rpm. It doesnt say one wire for rpm1 and a diff one for rpm 2 just says green for rpm. Is that for rpm1 or rpm 2 or what? im confused on it.