Planning to mount the body this weekend and want to understand what role the quick jack bolts play other than centering the car left to right. I see no attaching points of them other then going through the body. I see the body attaches at the front turn signal mounts, under the rocker panel along the frame, and the rear view mirror mounts. Does the body mount anywhere along the frame rails in the engine compartment? I think it just sits on foam there, correct? I assume the windshield holds down some. What attaches the rear of the car? The manual shows different length spacers on the rear quick jacks sandwhiching the body with washers. All my spacers on the rear are one piece. Should I cut them to length?