Another interior question....please help

[roll of the dices]

I am planning the interior for '30 roadster and I have the door panels and kick panels figure out; however, the rear panels, on each side of the bench seat, I am not sure hoe those are covered with the material..

Is there a panel similar to the kick panel that gets pinned to to the wood braces and overlapping fabric gets tack to the edge of the wood braces?

Or, is the material tack directly to the diagonal wood brace and wrap around the edges of the wood braces, perhaps with dracon like material on the top and side brace?

It appears that the the top and side edges of the wood braces are covered with hidden trim...but I also 3rd piping in some cases

Here are the only pictures I have been to find....but I am still confused.

Thank you in advance