I too could not find the mating RA SAE plug connector. I also wasn't excited about the installed roof SAE connector's ability to collect water around the two connector contacts.
So, I ditched the SAE connectorization and removed the existing roof flanged SAE jack connector. I installed an IP65 junction box in its place using the existing screw hole pattern. Heyco wiring glands were used for a waterproof wire entry into the junction box. The existing FWC roof wiring was long enough to be pulled out of the roof to terminate to the solar panel wiring in the junctuion box.
This junction box now supports two 100W Renogy flex solar panels. If we decide to add another panel to the roof, I will probably add another junction box to complete the wiring within the roof rather than routing the wiring on the ext roof surface.
The junction (or project) box measures 2.52Lx2.28Wx1.38H inch and is lower profile than the roof vents.
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