I had that problem with a fastback I owned over 10 years ago. If I remember correctly, the problem was that the bracket had to be attached to the Seat Back FIRST!!. I think I had to dismantle the seat back so I could attch the bracket using a backing plate that I made to hold the bolts, then re-assemble the seat back and attach the bracket to the side panel where the fold down latch would be.
Hope I remembered this correctly, and I hope it helps.
jay67fast
Hope I remembered this correctly, and I hope it helps.
jay67fast