Looking into the bodywork and am trying to figure out the types and shape of panels on the swage line as detailed below in big red arrows, this is on all saloons.

Looking at it there must be a roof panel coming down with a lip overlapping the rear slam panel which the boot apetures set into. There must be a seperate panel for the roof, swage line - Which is bulbous in shape - and boot shut.
Has anyone got a break down or cross section of this section they could show???