Wired ARB single to Voswitch switchbox a couple days ago - no air lockers, just compressor functionality for airing up
Did not need secondary wiring harness so it’s in the box (the one that would run into the switches in the cab)
Thick black and thick red to battery, thin black to battery - per instructions.
Compressor power cable/fitting to compressor power fitting.
High pressure cutoff leads to pressure switch mounted to compressor - does not matter what connector each is connected to.
On the opposite end of the main cable the thin red wire goes to your switch that provides +12v
Easy to test. Wire up compressor and pressure switch to connectors per instructions. Temporarily - run reds mentioned to positive battery, run blacks mentioned to negative battery. Should run compressor until pressure switch kicks in and stops it. If you do the same without connecting thin red to +12v the compressor should not run. You can connect your air hose to get a longer run time before pressure switch trips.
If your setup is similar to mine the thin red wire is the important one to wire to your switch that provides +12v. Since I am not using air lockers or the cool ARB lighted toggle switch I used no other connections - isolated them with electrical tape and wrapped them with tape to harness.
Edit - after rereading above I see that you are using a lighted switch and
@Boostpowered provides a great schematic for that setup. Since I have the Voswitch I just ran the thin red wire to it for +12v (or not) and use its remote switches in the cab. Took me a bit to figure it out and it works well.
Good luck!