How would I begin to open this Acer AL1916W monitor. I am not familiar with this little lock logo with a "K" on it in the lower right, do I need a special tool?

I can't find any other obvious screws or places to start opening at, I removed two screws from the stand but nothing came loose. Any help would be appreciated


I can't find any other obvious screws or places to start opening at, I removed two screws from the stand but nothing came loose. Any help would be appreciated
