Here is the result of a suggestion by friends of ours.
We have had difficulty bolting the front door fo4rm the inside since we bought the boat because you have to hold the sharp edged bolt and pull it toward you thus increasing friction between it and the slide which makes it difficult to get into the socket to secure the door.
Our friends borrowed the boat and had the same difficulty. "Could you fit a handle to pull the door in while we bolt it?" thye asked.
Well her it is!
17 minutes ago