PC3500TX Terminal Installation & User’s Guide - 5
♦If all wiring is not routed from the wall, remove one of the mounting bracket knockouts, so you can run the communication cable and 12VDC power pack cable to the terminal.
♦Insert the key into the mounting bracket lock and turn the key counter clockwise.
♦Align the slots on the back of the terminal with the tabs on the top of the mounting bracket. Plug in the power pack and communications cable, then lower the terminal into place.