I have a few of these and just put a bunch of dielectric grease in the connectors, didn't have waterproof connector to replace with in time last year. So I just crossed my fingers and hope, and they held up for the season. If you keep searching for others you can find listings that have the water proof connectors.'

edit:
this was what i've used for grease on connectors to help with waterproofing and corrosion https://smile.amazon.com/gp/product/B0083R1FME/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1