This is a corner mount for the Ubiquiti Unifi U6-Mesh (and UAP-Flex-HD) access point.
We needed to mount a UAP Flex externally, and wanted to get the best possible coverage by using an outward corner, so remixed the referenced models to produce the attached.
We did need to drill two small holes to fit mounting screws, which I will try to add on a rev2.
To drill the holes yourself, you will need to sacrifice the desk mounted cover, and drill through from bottom of the bracket with a 4mm drill bit.
Use the included screws to mount the AP securely from the bottom.
Optionally, apply silicone to the bottom of the mounting bracket for better water resistance.
To mount to the wall, anchor with any compatible wall screws. Use the bracket as a template to place your markings.
We used the inside of the bracket for cable routing, and enlarged the drainage hole to fit our cable. (You can use the included cable route if you want to terminate the clip yourself.)
Be sure to leave a drainage loop under the AP if mounting outside, and to enable Outdoor Mode in your Unifi controller.
The author remixed this model.
I used the bottom mounting clip and plate to mount the access point from Bryan Stansell's Model, and attached to the wall bracket from juchong's model.
Tweaks to both items for drainage/silicone and cable routing.
Full credit to both original designs - thank you!