If that connector had been sealed well, there shouldn't be that kind of corrosion. I will certainly check all the connectors of that type in my bay, Larry. Thanks for the report and heads up.
With my electrical bay accumulating a half inch of water regularly while stored, I keep an eye on it in winter and spring when we get heavy precipitation. Today I finally attempted as best I could to stifle the probable leak source, by applying Lexel to a bad spot in the windshield seal at the top. For some time I've been keeping a dessicant unit (Dri-Z-Air) in the bay to draw any trapped moisture away from electric components, fittings, and the white backer board that started showing some very minor swelling and cracks, typical in high humidity.
I thought I'd likely forgo that practice after I could get to Bend for a permanent windshield seal replacement, but perhaps we all would be well-served to keep a dessicant placement in our 12v. electric bays 24/7 at least during storage, and view it as part of necessary maintenance, like checking house battery fluid levels. That bay is where nearly everything 12 volt comes together, and at least in many of our coaches has some vital system controllers in it, including Alladin, HWH air, and inverter/AGS, etc. It's the last place you want moisture.
Thanks for adding fuel to my fire for that idea, Larry, and I'm glad you're road worthy again.
-Joel