I could be wrong but I think I would pull the seal out and rotate it forward so the slot in the rubber goes around the stainless that has that hole. If there is a hole in the rubber, it should line up with the hole in the stainless and they probably had a plastic pin that held it there. 3M weatherstrip adhesive behind it should hold it in place. Look the part up and see if there is a pin. If so, you can probably find something to replace it. I'll be honest, I have never replaced that particular seal but I have seen similar on other cars.
