I have the same unit.
I had water leaking at the aft window on the bedroom slide. The drain holes on the window did not drain the water that collects at the bottom, its a slide up type window. The window was defective. I elected to seal the window with black RTV to match the dark window and black frame, vs changing the window out or trying to drill the holes through. No problem for me, since i will never open that window anyway.
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