Hi Guys,
I am warmed by your responses and the ensuing conversation. I did slide down into the rear berth right to the back and took some photographs. These were taken, lying on my back on the starboard side of the stern, looking into the corner where 3 surfaces meet. I am slightly disorientated by the photos though. However, in one of them you will see the outline of the lazarette/locker.
My boat is on a swing mooring and I don't have assistance or company on the boat so it takes lots of sliding in, taking photos, sliding out, figuring out what is on the outside before sliding in again. Right now, I am not sure what that single screw is sticking into thin air. We are going into Summer now so I will be spending more time there this weekend and hope to figure out
1. What that single silver screw is.
2. Where that wooden backing plate and bolt goes to on deck.
Will keep you posted.