UniFi AP AC LITE Mount extension

I am about to mount a couple of Ubiquity UniFi AP AC LITE access points on a wall. There is an Ethernet outlet installed so this adapter will mount on the existing wall face plate screws and stand off the plate to allow the Ethernet cable to plug in and come out the slot to loop around and plug into the AP.
At least that is the theory. In a couple of days I may get around to trying it.
The Version 1 is only 20mm high so pre-wired Ethernet connectors will be to long. But if you terminate one wi