Well, my '37 isn't all fixed up like Alvin's (yeah, where is he?), but hopefully these pics will help out.

This is the passenger side cover. The handle is in the upright position for all of these pics.
This is a close-up of the locking mechanism.
Another close-up showing how the connecting rod is bent around to form a loop.
One more picture for good measure.

I looked in the '37 Shop Manual, and couldn't find anything on it. ... maybe I was in the wrong section, though. Hope this helps. grin