Mitsubishi Electric ECOV-X37VA Manuel D'installation page 24

6-1-6. Fixing the top of the unit to the wall
In addition to anchoring the unit's installation legs to the
base, fix the top of the unit to prevent it from falling over
due to winds, as necessary. Remove one screw from the
right side of the top panel, and use the screw hole to fix
the top of the unit.
(Use the left side as necessary on site.)
As a fixing screw, locally procure a self-tapping screw (M5
screw length ±12 mm).
WT09614X03_GB
Fixing hole on the top panel
24
(Unit: mm)
275