The tab on the side (with the round hole) in it mounts to the metal pedal assembly with a bolt. The "arm" on the end with the 90 degree bend goes thru the clutch pedal arm. The upper "port" is for the neutral safety plug and the bottom port is for the cruise control plug. The plugs are separate, not combined into one.
It will help greatly to know that the NSS plug is the same plug as the windshield wiper motor plug (1 of the 2). There are a million more of those around than the clutch plug (85-87 Hydraulic clutch only). The wires are different color but you will be splicing the pigtail in anyways.
I have one laying on my bench that I just pulled out of mine. Didn't take long to realize how much much I hate the D**B switch. The self adjusting feature of it sucks big time. As said earlier. it sets at the lowest position that you push the clutch pedal. You will EVENTUALLY, on purpose or not push the pedal all the way to the floor. After that, you MUST push it ALL the way to the floor every time you start it. In mine, that over extends the clutch diaphragm and puts excessive stress on the clutch slave cylinder.
I will mention that you cant get to the switch without removing the cover around the steering column and pulling out the plastic AC duct that feeds the D/S vent. It is a total PITA! Enjoy.