I attach a tow rope to the bottom wishbones, with one end on the left one and one on the right one. That way the load is split evenly between the two.
The car is light, and I have never bent any wishbone towing the car slowly for short distances.
Do not attach the tow rope to the drop links to the anti-roll bar. I have broken the weld on a drop link doing this.
Have heard several tales of engine covers flipping over and smashing the windscreen when being towed backwards, I would not take that risk. When you look at what is holding the lock in place, Chapman had taken lightness to the extreme there.