ZyXEL Communications C1100Z Quick Start Manual page 12

5. Insert and slowly screw the screws into the anchors (or the holes if
you are not using anchors). Make sure the screws are snugly
fastened to the wall. They need to hold the weight of the Device with
the connection cables. Do not screw the screws all the way into the
wall. Leave a small gap of about 0.5 cm between the heads of the
screws and the wall.
6. Align the holes on the back of the Device with the screws on the wall.
Hang the Device on the screws.
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