1939 pickup hood latch assembly question

[Bruce of MN]

Clem is right that the shaft isn't held firmly on axis. Two other items were a mystery to me.

The hook of the pivot lock plate (red arrow) doesn't fully engage the "handle" to the left of it in the pic below. That is with the pivot lock plate in my hand and trying to find some angle where it would engage the round cross section.
The stamped ridge on the top of the "handle" is surely part of the system, but I couldn't find any angle that would work. Should it? That seems to be the mechanism to lock the hood.

The disc (green arrow) tries to rotate when the handle is turned, but its ~3/16" thick edge just butts up against the edge of the pivot lock plate and doesn't lift it to unlock the hood. Clem has the pivot lock plate ears sticking through the bracket on the hood and a stiff wire through the ears to trap it in place. I should have taken a photo to show, but didn't. Is the disc supposed to slide under the pivot lock plate and lift it in a wedge action?