Same boat here too.Putting the easy install face plate was not sl easy either. No instructions or info, kinda run and gun amd figure it out. I added the Comms switch makes it nice, but funny adding the comms switch is not inline with the radio install instruction for running only direct to battery.
I also noticed that Rugged does not recommend a switch but then why do they sell a harness for it???
Anyway, I installed the Rugged SW harness and the filter just before the comms (electrically speaking). Bottomline is my wife took the Jeep about 5 miles from the house and the radio worked incredibly well for being in the city.
I expect that this weekend in the desert it will perform as desired.