There are 2 styles of these pieces that clip onto the top of the rear splash plate on the early B bodies.

I know the top one is definitely used on both 65 Dodge and Plymouth. Unsure if that shape (and the one different clip location) is a 65 only piece and the other piece is 63 & 64 (62's didn't have the rubber pieces on these rear splash plates). Can anyone confirm the years and models.