Cisco Meraki MR42E Installation Manual page 12

To attach the MR42E to the mount cradle properly, line up the top edge of the AP with the top tab of the mount cradle.
Since the cradle is already mounted to the wall, guide the MR42E towards the top tab and insert the top tab into the
MR42E's slot.
Then adjust the MR42E to guide the MR42E's bottom slot into the cradle's bottom tab until it clicks into place. Once in
place, the MR42E should be secured to the cradle by using one of the included screws in the cradle's bottom tab.
12