Is the spare bolted down just behind the seat back, on the right side? Is there 2 square 'loops' welded on that hump behind the seat back? One on the right under the spare, and another on the left side. If so the square tube jack-upright goes inside those 2 loops. The jack handle slides inside the tube before sliding the tube in place. The base plate gets bolted down on top of the spare tire with that tire hold down bolt and big wing nut. That is how my '71 Sebring was anyway.