Ok, I tried to put a tach equipped cluster from a 99 Mystique Zetec into my girlfriends 99 SE Zetec, but she don't have the tach signal wire. Does anyone know off hand how to find the tach wire? I heard it just dead-ends somewhere. Also, how can I splice this wire into the tach plug on the new cluster? I thought it had to have a metal pin inside the plug for the wire to work? Any info would really help me out here. Thanks guys!

02 Nissan Altima 3.5 SE, FULLY LOADED Old car- 99 SE Sport ATX w/ SVT body kit (for sale...asking $4,200 OBO), nicely modded, high-flow exhaust y-pipe back and KKM. 95K, but 95% are interstate highway miles back and forth to college everyday.