I use a 2” ratcheting 10000# strap (Home Depot, $15) on each of the front OE tow hooks to a D ring on the front of the trailer. On the rear, I do the same thing except around the lower arms.

My plan is to make the front straps a fixed length and only ratchet the rear (Dick, thanks for the idea). Cuts down half my work and keeps the car in the same spot every time.