Furrion is the maker of that solar port fspins bs.
Furrion solar panel port.
Generally the only way to obtain this plug is when you buy a furrion solar panel.
The furrion solar port is a rare two pin port not found on most solar panels.
Any solar panel like the 2 5 watt solar battery charger ptw2997 you mentioned can be made compatible.
Connect any zamp solar portable solar panel kit to an rv equipped with a furrion solar port.
They make proprietary solar panels that use this port.
The furrion solar port inlet is designed for use with the furrion 10a pwm solar charger and furrion portable solar panels briefcase and kickstand models.
High quality copper stranded wire uv resisitant wire waterproof.
You can probably imagine why they would do this hint.
Using the furrion solar port.
However zamp a competitor of rv solar panels does make an adapter from the furrion plug to their panels.