Rick. You are right to think of them as 4 drive shaft loops. You need to keep anything from making a pole vault of your car. Most use 3/4" to 1" wide 1/4" straps attached to a frame member of some kind about 2" to 3" from the heim or attaching clevis at the front of the 4 bar or traction bars. The 1/4" cable is an option that's allowed. A "crosby" type clamp is allowed to attach the cable ends together.