Cabin casement window

A quick learner from Pennsylvania says:
I have a casement window at my cabin in Pennsylvania. These matching windows close up against each other, but there's no latch besides the operators, which don't work.
Please ID hardware to properly secure the Windows.

I'm going to try the 39-020 (021) operator, but what about a latch?
Do I need to insert a post for these casements to butt up against?
User submitted photos of window hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I agree, the 39-020 and 39-021 look like they could work, along with the 39-520 track. As for the lock, how about something like our 90-152? This seems to be the best solution for twin windows like what you show. I think if you were to install two locks on one sash and their keepers on the other, that might do the trick. However, you will need a type of wood trim on one sash to close up the gap between them so no one could slide a thin screw driver and unlock the window. We also carry the 40-012 slide bolt. If you go this route, you'd want one at the top and bottom of each sash.
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