It's been some time since I had an opportunity to look again at the one damaged cover on the passenger side, and the missing cover on the drivers.
The link above has all kinds of parts diagrams, but so little reference to where they go on the car as to be useless. The "floor" sections are steel, for doing bodywork.
I knew all this before I posed the question. That's why I asked. A little less snark would be appreciated; not everyone came from the womb being experts, and someone was nice enough to answer YOUR questions at some point without snark; try doing the same.