I was trying to detach my handlebar, because lowering was insufficient to make my bicycle fit in my box. I detached the long screw going connecting two lids thereby fastening the stem-handlebar connection, but the lid of the left side is stuck:
Can I use some gentle violence here, or do I need to unstuck the lid in a different way? I'm not sure if there is a thread inside the hole, and I'm not quite sure why the cap has ripples. I don't want to destroy anything.
Note: I'm not sure if my terminology is correct overall