34 rumble seat gasket seal installation

[Barnhay]

I need some help on how to correctly install the u-shaped rumble seat gasket. I've seen conflicting pictures in different places. The picture that makes the most sense to me is that the flat part of the u-shaped gasket is glued to the rumble seat lid, and when it is closed the u-shape fits over the body flange. Anybody know the right way to do it? Thanks!