Those corner deflectors are for Frigidaire dishwashers, they may fit in the Jenn-Air but I really doubt that is your problem.
The most likely problem is a hole in the plastic tub right in the little corner pocket area.
The reason I suspect this is one of these exact same machines got me once when a customer took the unit apart and left the kickplate off but put the screws back in the holes so he wouldn't loose them.
The problem comes when you put the long lower screws in the top of the kickplate panel, (the short - only about 1/2" long - machine screws go in the top). The long screws are too long and screw right into and thru the plastic tub then when you take them out you have a hole and it leaks like crazy and it's really hard to tell where it's actually coming from because the hole is right behind the bracket that the kickplate mounts to and it looks like it is pour out over the gasket area.