Yamaha 2CMH Rigging Manual page 77

REMOTE CONTROL APPLICATIONS
6X3 REMOTE CONTROL DIMENSIONS
13 (0.51)
54.2
(2.13)
251 (9.88)
60.1
(2.37)
89 (3.5)
123 (4.84)
32.8 (1.29)
60.1 (2.36)
If a panel board thickness is below 20 mm (0.79 in.),
make three 7 mm (9/32 in.) holes and use the supplied
bolts and nuts.
If the board is thicker than 20 mm (0.79 in.), make three
4 mm (5/32 in.) holes and use supplied screws.
3-7
mm (in.)