1973 dart sport rear deck lid

Purchased my car the other day and the deck lid was sitting on the hinges with a broom stick holding them down.. does anyone know how to re attach it? I just don't know how I would put a nuts on the other side of the bolts because theres no holes in the other side of the skeleton to reach through?? Any help would be appreciated! Thanks
Are the holes on the hinges themselves threaded?