508D Adjustment

I am trying to adjust my 508D connected to my 791XV. I have searched the term 508D to read ALL of the 30+ threads about the unit but not one has described which one of the little orange knobs controls which. The only thing that I read that was usefull to me was that the Red light was for the inside sensor, the green for the outside. Now the way I have been doing it is basically tryign to adjust, installing under the shifter then seeing if it worked, I have no manual (the shop threw it out), and I dont know which knob does which, also if you have suggestions or tips and tricks on how to perfect the adjustment process or how you do it yourself I highly appreciate it. Thank you VERY much! Gasper!

bumpGasper!