Hi and welcome to NICO Club!
Can you post a picture or a better description please? Maybe you'll see the hose in the FSM and can point to that? The upper radiator hose is on top, in front and is not behind any belts or cover. I see both clamps within reach in a photo. Same goes for the upper elbow of the lower radiator hose. It's a little tighter to get at the rear clamp, but still doable without pulling belts. The only thing I see mentioned to be removed for access is the air duct from the mass airflow sensor to the throttle body.
Here's the FSM. That might help. The LC chapter is coolant stuff. The FWD chapter is the Foreward and has the table of contents.
http://www.nicoclub.com/FSM/Pathfinder/1998_Pathfinder/