I have a 52 Chevy 3600 truck. Got a kit containing the outer door window rubber which is t shaped and is suppose to install in the track on the outer window side. This is a new door and there is a slot on the top part of the groove but the bottom is straight or slightly curved. I can use weatherstrip adhesive to glue in place but I am not sure of the orientation of this outer window rubber. Does the rubber flap come across the window slot or does it mount vertically.