ZyXEL Communications C3000Z Quick Start Manual page 11

4. Use a hammer to tap the screw anchors into the holes.
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.
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