I am having a little trouble figuring out which wires are my tach wires. Looking at the rear of the engine I have 4 pickup coils. Some of the wires had been cut before I bought the engine. Facing the rear of the engine, the bottom coil on the left side has two wires which were cut. I found two matching cut wires in the braided sheath running from the top left coil to the ignition box. I spliced them back together. The were matching colors and tracers. The only other wires coming out of the engine are the two red ones which I think are the ignition circuit charging coils. I guess my question is which pickup do the tach wires come from and am I missing a pickup? Should I have 4 or 5?