Tach Install

I have a 95 eclipse gst and i wanna install a tach, I have all the wires hooked up except the green tach signal wire. I cant find where to hook it up.I read on a website that I use the #8 Pin on the ECM but i dont know where the ECM is located plz help.

it was the white wire on my friend 96 rs
try that or call autometer