Couple things here. You said you loosened screws on your Apple watch? As far as I know, Apple watches generally do not have external screws. They are held shut totally with adhesive. I also can't find any images that feature this spot in the Apple watch, so it might be helpful to have a zoomed out picture, so we know where to look.
Over all this one might be tricky. We'll need someone with a known good Apple watch to measure. Depending on what the component(s) are, this may not affect function. But something tells me it is, or you might not have noticed. I will help to know what exactly was going on in the first place that prompted you to open it up.