2001 XP Restoration - water leak - stumped

[Wolverine]

Knee deep in my restoration of a 2001 XP. Ran into a water leak that has me stumped. When I have the XP hooked up to a hose, engine running, water builds up in the rear compartment. No leak in the front (headpipe). No water in front compartment (ski is level). Thought perhaps the water line from rear to front was leaking (maybe a split under seat) so I disconnected hose from head pipe, plugged that up, tuned water on, no leak in that hose. Now I am stumped, what am I missing? I attached pictures. Appears the drive shaft is throwing water out the right cover. Are there any other hoses I cannot see? This leak has me baffled.

 

[Boyd12]

Here is a diagram. The red arrow is where you hook up the hose to supply water to the system. Did you plug the hose and the pipe?

 

[Stevie96xp]

Water box could have a hole in it