79 wire color codes on ignition switch

[usmc triggerman]

I need a little help i am hooking up MSD and a auto meter tack both have a red wire that needs to go to the ignition switch i looked on the back of the switch and there is like 5 or more wires which one would i run them in to i just don't want to hack up alot of wires to find one please give me some help!!!!!!!!! :wacko:

 

[ratgodak47]

Hook up the tach directly to the tach output on the MSD control box and the wire from the MSD to the positive side of the coil which should be only hot when you turn on the key