Thank you Emyshorts! The fill port is exactly where you described it. Not marked in any way, just a black hex nut on the floorboard right side of the driver's seat. Got the leak fixed and added fluid and we're good to go!
I have a 2020, New Holland Workmaster 60 tractor and have developed a hydraulic leak that is affecting the steering. I can't locate the port to add hydraulic fluid