Philips ITS4843B Installation Manual page 53

Mounting the IntelliVue Smart-hopping Remote Antenna to a Wall (CA Earthquake Rated)
4. While holding the RA chassis with its antennas pointing down as shown in
Figure 2-17, fit the openings in the back of the RA chassis over the two
mounting studs that protrude from the wall plate, and then slide the RA chassis
down so that the mounting studs are securely in the grooves in the back of the
RA chassis.
IntelliVue Smart-hopping 1.4 GHz Access Point Installation Guide