Just trying to be helpful here, but unfortunately without actually looking at it and seeing how it's assembled at the factory, all you will get is speculation! Our 2020 pinnacle has the solar on the side, SAE type plug in it's wet bay, but it was not connected at the factory, just loose wires hanging behind a service panel. No solar controller is included, usually a solar side panel has it's own controller. Look for a label similar to the one I posted, it will tell you the auto reset breaker amp rating. The label may be behind a close out panel. Likely it's 20A, which is what most of the 2 pin SAE connectors are rated at. Absolutely no reason why you can't run accessories off of it as long as it's connected properly, you verify the polarity, and the desired load is within your 5er's auto reset breaker's capacity.
2020 Pinnacle 32rlts
640 watts solar, 300AH lithium
2020 High Country Duramax 3500
Ms says I'm full of useless knowledge and other stuff...