Are these from a ca95
 

I think these are off my ca95 but can't find where they go

Brass square nuts - can't recall seeing those on my CA95, but through multiple generations of previous owners, fasteners sometimes get replaced.

All I can do is guess. Could square brass nuts have been used for battery terminals, since brass nuts tend to resist corrosion? Again, just a guess.

Those are the inserts to the plastic inner guard that mounts in the lower part of the frame on the inside. It is unusual for them to be free of the guard as they are normally molded in the plastic.

Ah, that explains the groove in the side of the nuts.