NightHawk

I got an 80' model chevy citation 2.5L and had a little running problem so i decided to try out the msd. The thing is i'm only familiar to japanese cars. Since it is an old chevy i figured it would be too hard to figure out but this is no ordinary chevy. I have no diagrams or nothing on paper so this is all speculation. The + wire from the battery goes directly to the stock coil and 2 wires (one that spilts in two) go of the + terminal on the coil (all red) and another red wire connects to a smaller terminal on the coil... and that's it, and i don't quite get it. These red wires of the + must be connected to the fuse box. But i know the +, but where is the -, the switch wire and where is the trigger?