LG WM-B840H Owner's Manual page 33

Location of the holes for multiple installation: portrait
NOTE
Only drill the holes into the wall for the attach spacing jig if necessary.
It can be mounted by using the side holes of the wall mounting bracket; no drilling is necessary.
The center of the wall mounting bracket and the set is not met.
591 mm
332 mm
Exterior of Jig holes
352 mm
591.6 mm
LOCATION OF THE HOLES
Exterior of attach spacing jig
Wall mounting bracket holes
Exterior of wall
mounting bracket
Exterior of monitor set
15