3.Align the wall mount cover and screws with the holes in the wall (or stud).
Align
4.Loosen the screws and the metallic plates to release the wires from the doorbell.
5.Use a sharp object to open a hole on the soft plastic part on the doorbell wall mount cover, then route the power adapter cord through the hole.
Open a hole 
and route the 
cord through 
the hole.