there should be slots along the rubber seal and the trim sits ontop of the rubber as a trim piece......but...not flush against it. This way the air flow goes up throu the rubber slots hits the trim and is directed up the front of the windshield...?
I have one 54 cab assembled and one 54 cab completely stripped. Photos of them would probably not help your interest in imagining/visualizing how this works.
"The deflector/cover does not close the openings/slots, it goes over the slots. There should be "stand-off" clips under the cover/deflector. The cover/deflector very effectively deflects and spreads the warm defroster-air against the windshield."
The deflector cover does not touch the windshield rubber seal (or any other rubber seal) - the deflector is held off/up/open with metal clips (that are often broken/rusted). If I remember tomorrow, I will post a photo of the back/under side of deflector/cover, so you can see the stand-off clips. By the way, no one sells reproduction-replacement stand-off clips.
