manually setting ARC shocks

Does anyone know how to set the ARC shocks in the firm ride setting by just twisting the little tab in the top? This is on a car that is being put in the 24 hours of lemons race, and all the wiring and modules are long gone, but I would prefer to have the shocks on the stiff setting if possible, but I have no idea what position the tab should be in for the firm ride setting. Any help would be appreciated. Thanks.

Mike

if only you had an actuator it'll tell you on it..
sorry no real help.. since i do not know.. i know that between soft and firm is a 90ish degree turn...

Hey mike, did you swap out the shocks to tokico, because if I remember correctly those shocks were ac delco on there. that is if we are talking about tha cougar.

The fronts I swapped out to a set of factory shocks that I had laying around. The rears still had the ARC shocks, so I left them alone.