I bought an Auto Meter pro shift lite and have a question about hooking it up on my 97 Cobra. I bought the model 5340 which is for regular ignitions. I have a ground and power wire which is fine. Then I have a green wire to hook up to the coil negative or electronic tach terminal on an aftermarket ignition. Where do I hook it up? To one of the wires at my coil pack? Thanks.