Craig if your Furrion connector looks like mine it is hard for me to see that it could hold a cup of water. Several times after a rain I have opened mine and found maybe a teaspoon of water. I don't think it would hurt to drill a small hole at the bottom of the cover. You might put silicone grease around the gasket to improve the seal.
I have never had the bottom trim piece come off on our Dometic refrigerator in our 2250DS. I just now took a photo to show how it looks in place.
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Ken and Joyce
2017 RAM 1500 Lone Star Quad Cab 5.7 Hemi, 8 speed, 3.21, Tekonsha P3
2018 Winnebago Minnie 2250DS, Haloview MC7108
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