VTech IS741IS741 User Manual page 9

5.
Loosen the screws and the metallic plates, then slide the
metal part of the wires underneath the metallic plates as
shown. Twist the screws to secure.
Metallic
plate
Wire with
black end
If you already have a wired doorbell
installed, see Installing the doorbell with an
existing wired doorbell on pages 12 and 13
to install your new IS741 doorbell unit.
6.
Push the doorbell gently onto the wall mount until they are
sealed tightly.
This doorbell meets the IPX4 waterproof standard. Make
sure the doorbell is tightly sealed with its wall mount in order
to maintain its waterproof ability.
Seal tightly
Push
Push
Screws

Metallic
plate
Wire with
red end