the manual, as usual, is not help!
Solar Prep If equipped, a solar prep quick connect will be mounted on the exterior sidewall or roof. An aftermarket solar panel kit can be purchased to utilize this feature. Please refer to the manufacturer instructions supplied with the RV for care and operation and/or www.furrion.com
Would seem to me that you would need to add a charge controller. Can you tell if the wires go to the power distribution panel or directly to the battery. I went to the aftermarket sites (DON'T GO TO THE THIRD ONE) and they indicate that their systems come with a charge controller.
my guess is that you would need to add one. But where would you put it?