The panels shouldn't be leaking ... maybe it's your door rubber ... OR you might want to put "shower curtains" behind the panels -- remove the panels; wherever you see an opening in the DOOR, take a piece of plastic (heavy duty garbage bag) cut larger than the hole; tape it above the hole with some duck tape and then tuck the bottom of the plastic IN. That way, water comes down, inside the door, from the window ... hits the plastic, and continues to run down inside the door instead of hitting the back of the panel and running down that.
Hope that helps.