Honeywell Midas S2 Quick Reference Manual page 9

4. Drill two holes 2.3in (58.50mm) vertically apart for 2 x round
head M4 screws, using the separately provided drill template on
the ROHS sheet.
5. Partially screw the fixings into the mounting surface.
6. Place the mounting bracket assembly over the screws, so they
pass through the mounting holes and then slide down to locate
in the slots.
7. Tighten the screws to secure the mounting bracket assembly.
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