I have a 2004 A4 avant and the rear hatch windshield washer is not working. Does anyone have the routing of the hose that sends the fluid back there? Someone worked on the car before I purchased it and I have a black hose by the windshield washer arms that is not hooked up and I can't seem to locate where it needs to go. Headlight and windshield washers work fine and there are no leaks in the system.