I'm not sure if it does anything. I looked on my V20 and it's just a spring loaded contact point. From the tear down video, I didn't see anything connected to it. I also have an extended battery with a TPU cover to replace the stock back cover, and no ill effects other than a loss of NFC (which I don't use anyway). Look at your back cover and see if anything on it lines up with where that little point would be. I.e. A circuit trace on the inside of the cover.
I don't think I'd be too concerned about it for now, though.