Komatsu H75051 Operation & Maintenance Manual page 234

MACHINE OPERATIONS AND CONTROLS OPERATION
Adjusting rear view camera angle
Adjust the angle of the rear view camera so that people within
1 m away from the machine's rear part (W) is displayed in the
monitor at the operator's seat.
If the image on the monitor is not aligned correctly, adjust
mounting angle (A) of the rear view camera.
Angle (A) can be adjusted within the range from 37 to 52 deg.
3-168