How to trick rear air suspension?

[mattds]

So after one long day of wrenching I installed a 2" front level. Now I need about 1/2" on the rear.

I thought I saw the sensor on the rear that one can trick/adjust to set the "normal" ride height (an presumable set it a 1/3" higher) and now I can't find it...

Does anyone know how this is done?

Thanks
M