Basically on your MAF you will find the plug conection has A B C D E F running across the top of it.
PIN A = EMPTY
PIN B = SIGNAL
PIN C = CHASSIS EARTH
PIN D = HARNESS EARTH
PIN E = POWER
PIN F = EMPTY
So use my diagram below to connect to the right wires from your Z32 MAF plug to the standard MAF wiring harness.
Easy
Steve