Push the motor mount PCBs from the top of the main board so that the holes line up with the
mounting holes in the motor. Pass the 25mm screws from the outside, through one mount,
through the motor and then through the second mount. Screw into the M3 nuts on the inside.
Repeat for both motors.
Red wires should be screwed into the terminals marked with a +, and the black wires into
terminals marked with a -. This gives a Red - Black - Red - Black arrangement
