HELP with rear benches pleaseeeeeeeeeeeeeeeeeeee

Hiya guys, ive just taken my corrado rear bench seats out,(for sale, once ive taken a few pictures) Im having trouble figuring out the best way to get my mk2 bench in there, fits nicely but the mounting points are different. So i was just wondering if someone could advise me or point me in the right direction. thank you everybody, the cars getting better every day, so any help would be appreciated,
       kainesbwza