Who to fix/replace the zoom spring?

Hello, when I took my TG-6 (identical to TG-3) out of the underwater housing, I accidentally ripped the release button (including the zoom ring) out of the housing. 
On this page I got instructions on how to disassemble everything to easy access to where I have to fix it. Unfortunately, I have troubles to understand where an how exactely put the spring of the zoom to make it moving again. 
It would be really helpful to see how this spring was originally placed. Can someone help me?