Ubiquiti Networks UniF AP AC Outdoor - Manual (Page 9)

6. Attach the UniFi AP to the Mounting Bracket:
a. Position the UniFi AP with the Mounting Bracket aligned
between the mounting tabs on the back of the UniFi AP.
b. Slide the UniFi AP downward into the grooves of the
Mounting Bracket until the snap pins engage and lock
the UniFi AP in place.