740 & 760 M47 Transmission. What is this spring

in General
Hi all,
I just opened the top lid on my junkyard M47 to get an idea of its condition.
After opening the transmission lid, i heard something metallic pop out, and to my surprise there was a spring on the floor that looks to have fell out of the transmission.
It looks like this:
Any idea where it could be from?
And if its even from the transmission?
Comments
That looks like #73 in the diagram
I think it's location is on the selector yoke but I could be wrong
It pushes down that ball on the selector yoke
Yep - that's it.
Thanks a lot guys!