As a bit more of a description. There is a small "end cap" piece of metal at the front of the rocker.
My car had the passenger front rotted out, the drivers side has an odd circle in the center.
I don't know if perhaps had some rot and got welded shut, but the rocker caps I see are advertised as E body units with "Will fit B body" and they have a welded nut in the center.
Didn't know if its used on E bodies and not B's and just needs welded shut. Or if it is used on B's and Ill have to drill a hole and weld a nut there or just buy the piece from AMD since its only around $30.