I'm looking for advice on which product will best fit the existing opening. Is there one that fits without cutting the fiberglass. I know that others have done this and will appreciate advice on how best to go about it.[/QUOTE]
I found a 30 amp bulkhead connector at Menard's, or you can try any good Electrical
supply store. I think the manufacturer is "Leviton"
It was a lot less $$$ than a marine type, which has to be water proof.
This one says it is rain proof with the lid closed.
I cut the existing Scamp cord and spliced it to the new connectors so I did not have to disturb the existing connections at the power center.
I used the original hole to locate the cargo door for access to the storage space.