Access to the interior of each Dorade box is via an inspection hatch in the forward cabin wall.
I cut out the openings a long time ago, so now I just needed to make sure the inspection hatches fitted properly.
The first task was to align them neatly, and then mark up and drill pilot holes for the retaining screws.
Each inspection hatch was then fitted with a couple of screws to make sure all was well.
Here is the starboard hatch in place.
And here is the port hatch.