Today Wilkinson showed me the cutout on the chassis that was engineered for towing. It is an oval slot (on a diagonal) that is designed to accept a "T" hook. The metal in that area of the car has double thickness. This slot should be used as the anchor point for the winch on the flat bed truck.
Once the car is on the flat bed, I think webbing over the wheels is the least likely way to damage the car when securing it to the truck.
Here are photos of the slot and an example of a "T" hook.