PRIMARY SECUREMENTS
Primary securements consists of straps and chains.
SECONDARY SECUREMENTS
Be sure to allow enough slack in the chains for turning radius, but not too much slack to where they are touching the ground.
STRAIGHTEN & SECURE THE STEERING WHEEL
In the event that there is a disconnect and the casualty drops to the ground, this will help prevent the casualty from veering outside of the square of the back of the power unit.