Lady Elgin 10 size Key wind and set Disassembly

Hi Group,
I am a novice way out of my element, but.
I am disassembling a 10 size lady Elgin key set key wind.
How is the square for the set attached to the center pinion?
Is it a threaded arrangement?
If so, is it right or left hand thread?
Same question with the winding square.
Thanks in advance.
Mel

Moved to proper forum