ADLINK STC-15W04 - Manual (Page 22)

12 Getting Started
5. Hand-tighten the mounting brackets with a Phillips-head
screwdriver to secure it to the panel. Do not overtighten
the brackets to avoid damaging the device enclosure.
CAUTION:
Do not overtighten the brackets as this may damage the device
enclosure.Always tighten the mounting brackets BY HAND to
secure it to the panel.