Sunroof Finish Panel Question

It does interface with the rail you are pointing at in red.

The blue arrow is pointing at the pan edge, which is where the windlance trim piece gets mounted, it holds the cardborad headliner to the pan. The inside sliding finish panel does not actually relate to that other than coming very close to it when closed, but neither the pan perimeter opening or windlance specifically support the finish panel. The finish panel is supported by the slot in the left and right channels (catalog item 9), and its own structural rigidity. The panel does not get supported by resting on 9, but rather sliding in 9 slots. I will draw up and post a sketch to illustrate this for you.