Silent base 601 Spring, Help!

[Jose Peynado]

So I was in the process of building my first pc and to my understanding everything is fine apart from this. Had minor problems along the way but I’ve managed to get through them. My biggest concern is what happened with the case. Instead of pulling out the meshed shield to install radiators as bequiet’s manual recommends, I removed the whole top pannel not knowing this was a thing. The reason why I missed this part is because bequiet gives me a 1-5 page manual before it turns into another language, so I thought that’s all I got. Turns out on page 50 or so there were more english instructions specifying this. So I remove the top panel and hook up the radiator, etc. When doing so I realized something fell out of the top panel itself (image attached) and it looked rather important. I have no idea where it fell from and would love help from any of you guys. I realized that spring is what activates the mechanism for attaching and detaching side panels. The top panel is properly installed apart from that spring so when I was on last step of putting side panels back together it wouldn’t lock those in. How they work is by pushing a button on the top/rear of the case, releasing something in the corresponding side panel, which I then have to gently pull up to remove. This spring is definitely for that because now the buttons didn't spring out when I tried attaching the side panel’s again. My biggest concern is that it was only one spring that fell out, yet both buttons don't release/react to the side panels. Please help! Let me know if more images are needed I’ll be happy to add them