I connect power (thick white) to switched power, ground (thick black) to ground on the back of the plenum where the other one grounds, the white signal wire goes to the blue lead on the AFC (I think that's right...), the black signal wire gets tied into the black wire from the ECU to the primary MAS. You'll need 11' plus the old MAS connector to reach through the battery opening to the ECU/AFC area. I use shielded cable (Belden 1508a, which is a little thin, but works fine) for the signal with the shield drain grounded. I've got 1/2 a tech page written (like so many others)...
Later
"Never underestimate the power of a wheelie." - Jesse James on Monster Garage's BTS show. Couldn't agree with him more... still waiting to see NiXit's Joop do a reverse wheelie.
When was the last time you *really* did something with your Z to call yourself a Z enthusiast?