Hi all - I am new to bike maintenance, and took apart the rear hub of my 1977 Centurion Super Le Mans to see how it works without paying enough attention to where all the pieces were coming from. While I was at it, I cleaned the ball bearings and am putting it back together.

It seems to be back together decently, but there is a small spring that I couldn't figure out where it was supposed to go. Can anyone help identify where it should go?

It's a bit awkward to deal with because I don't have a tool to remove the freewheel. I guess I should get one!

I would post a photo of the spring but this forum won't allow me to as a new member.