Need help on tach wire from Micro tech
 

Hi guys I have a Micro Tech LT 10s with the 4x. I have everything almost wired. There is a wire that is grey/blue and it says to plug it to +12v out, where do I connect this to? I still have the stock tach, where do I plug the yellow/green wire that was on the old coil set up,( I guess thats the tach signal wire to the tach) now I have 4 msd coils.
The wire schematic says to hook the pink wire to +12v ignition wire to power up the micro tech, and splice this and wire it to the positive of the coils. Can I use the black/white wire that was on the old coils or just do it with the pink wire. Thanks for any info:


Edgar