Rancho 9000 9118 shocks, how do they work?

[RamAirZ]

Hey guys, I just picked up an 85' Suburban for our family rig, and it has Rancho 5000's up front but the rear shocks have part# 9118 on them, which are the 9000's. Instead of an external adjust knob, there is a line running out of them which looks to be an electric line. There is a simple 2-sided toggle switch on the dash (left turns something on, right turns something on, middle is neutral). When I flip the switch I hear something click out back, but from what I gather online the shocks are manually adjustable, or am I wrong? I thought you had to turn a knob on them? I've run adjustable shocks before but never these types and have no experience with them so thought I would post here and see if I could get some info, thanks!