I again have a problem with wiring. When I removed my old wiring harness 2 1/2 years ago I identified three wires going to the alternator. The wires are labeled 1. STA 2. FLO and 3. BAT. Now my new E-Z harness has two wires. They are labeled ALT POWER and ALT EXCITER. I am really confused. I've never heard of the exciter. Any ideas or tips? Thanks