Mounting the AP3915i to a junction/gang box requires a WS-MBI-WALL04 bracket, which must be purchased separately.
Note
When you line up the holes, the locking tab on the bracket must be pointing down and the junction/gang box must be fully covered by the bracket. The bracket must be square to the rest of the room walls and the two holes that are being used must be on the opposite side of large center hole on the bracket.Note
If the holes that you need to use are not near the corners of the bracket, break off the corner to decrease bracket‘s visibility once the AP is installed.Caution
Over tightening the screws will cause the bracket to bend. If the bracket bends, you will not be able to align and slide the AP onto the keyhole posts.