a closer look reveals
If its like my 82 a closer look reveals a gap between the headliner "pan" and the floor liner "pan" up in the corner above the settees. You cannot see this gap without getting in for a close look as it is nicely hidden by a lip molded into the headliner "pan." Looking up into the gap between the liner pans reveals the bottom of the throughbolts for chainplates, stanchions, and the screws going through the toe rail, deck, and into the hull.chris