With the shifter in park take the clip and pull it so the needles on park, clip onto collar. To check it put shifter in first and see if it lines up if not make the necessary adjustments. There is no other adjustment for this.
This is the wiring harness for a/c on mine, note the red wire. altho I can't say it came from the factory that way, the vehicle i pulled it from was pretty stock and didn't seem like the p/o screwed with things