The pic's are there now. two of them are out of focus but the one good one is enough for the folks here to be able to help you.
That's been leaking for quite a while and it appears that it goes right up to the fire wall. I would see if I could remove the adjacent wall panel and try to determine if the leak is further up the wall. If it isn't then it could be from the wheel well, but you must find and fix the leak before you go any further.
HR does not have the brochures for 97 but the 2003 Endeavor brochure describes the construction here:
Alumaframe® Superstructure
Steel Cage Cockpit, Chassis and Firewall
Construction
Peaked Aluminum Roof
with Fiberglass Insulation
Smooth Gel Coat Fiberglass
Exterior Walls
Front & Rear Molded Fiberglass Cap
Fiberglass Front and Rear Bumpers
(Integrated in Caps)
Metal Fuel Access Door
Stamped Grill Door
for Transmission Cooler
Engine Doors Struts
Angled Fiberglass Engine Cover
Entry Step Storage
Steel Framed Floor
Laminated Structurwood™ Flooring
Air Activated Power Step Well Cover
Interior Paneling with 3/4” Insulation
Foam Insulation Underbelly
with Luaun Backer
You may want to call HR and see if they can tell you how the floor is constructed:
•Technical Support, Parts and Warranty Assistance: (877) 466-6226
Good Luck
