Where do these parts go?

[qhoti]

Hi,
I was taking off the back of my fed 2 when the lock fell into my hand and when I opened the back I had these two toothed gear looking parts. I doń know where they go! I know that there's one under the winder..

 

[Mikey_Rotten]

I hope this will help you

http://www.rangefinderforum.com/forums/showthread.php?t=895

 

[FrankS]

Probably not important.