Need help: Which wire is for tach (behind cluster)

[MonkeyMadness]

Looking for the sending wire, behind the cluster.
There is 3 "C" plugs that plug into the back of the cluster and I need to know
either the pin out for the tach plug or I need to know which wire is the tach sending wire to the gauge of the "C" plug

1. What i need to find off the plugs is the sending wire (color and pin) for the tach from the DME/motor
2. Ground wire...
3. 12v to cluster

Shouldn't be too hard right.... ya what ever! having the hardest time finding them.

Please need your help...

[Gregs///M]

Engine Speed Output - Blue connector, black wire, pin 7.
Ground wire - Any solid brown wire.
12V to cluster - Blue connector, red/green, pin 2 (hot all the time)

[MonkeyMadness]

Waffling Awesome! You are the man, and that was what i was looking for....

Thank you very much!:o