weatherstripping

Dennis Carpenter manufactures roof rail rubber seals (C80z-6351222-3) that fit 68-69 sportsroof fastbacks only. I have a formal roof hardtop coupe (C80z-6551222-3) for which they don't make a part. I wonder if anyone else has as run into this and where you located replacements or specifically...

Can someone please help me figure out how/where these dog leg seals install on the doors of my 63 Gal? Even after a bit of research I'm still not sure how or where they mount. Are they even necessary? Thank you!