The car is secured to a large framework. There are hydraulic rams that can pull from almost any height or angle through adjustable beams, pulleys and chains. A good frame guy can do magic. I have pulled numerous frames and unibodies close with chains, poles and compound low on my truck. Towtruck winches work well too... HTH, Ben Happy New Years!
You are correct:
It's amazing what a little ingenuity can accomplish.
Thank you for your clarification.
RK