I can see by your photo, why you would be confused. So am I. On my '45 pu, I recently removed the mating interior "scraper" from my door panels. They basically meet the glass at a right angle. Looking at my yet-to-be-replaced exterior scrapers on the window opening of the door itself, it appears to me the scrapers meet the glass at an upward angle, facilitating scraping water off the exterior of the glass. I think I'd experiment while installing the glass, to see what makes the most sense. I think maybe, the scraper you are using is for the interior door panel and maybe there is a different profile scraper for the exteririor of the glass?