Using (3) 50 mm hex-head socket screws, and (3) 1” x 0.5” standoffs, you will now attach the motor/drive axle assembly to each of the motor bearing blocks. The screws go into three tapped holes in the motor frame. Although there are four bolt holes in the block, only three holes will be used to mount each motor.
Although there are (4) mounting holes on each of the motors (as well as the blocks), only (3) are used in each drive wheel system.