You are going to have problems with that alarm on the Z. basicly that wire has to be wrapped round an HT LEAD which makes it act like a receiver.
Very basic way of doing things,but if alarm cant detect vehicle has started it will keep on cranking.
All of the top make remote start alarms pick up off rev counter wire or speaking from fitting lots of remote starters to Z's i always use one of the injector wires.
you can contact me direct on 07981381186 for more info.
Best rgds,
Paul.