I would bet you have 'city water', though, as I don't know of any of these type of campers that don't - my son has a 2014 295BH. He has a city water inlet right outside his bathroom wall, on the driver side, probably very similarly placed as yours. The gravity water fill is actually on the OPPOSITE side, the passenger side of the trailer.
I just watched a video where it clearly shows a 'city water' inlet right above the wheel on the driver side,..
The 'city water' inlet has a 'cap', and yes, has a threaded female inlet to receive your male end of the water hose. It generally also has a screen filter inside it. The body of the inlet 'rotates' in order to screw in the water hose. I suppose it's 'possible' it got covered over by the metal siding and was never caught during QC at the factory.
The 'gravity fill' also has a cap, but it is a 'screw on' type cap, and no threads needed within the inlet.