Yes, I have seen those pictures, not good enough to see everything exactly. What they usually do is hide screws under stickers, rubber pads or something like that.
Than all is either glued (messy thing to open) or it's clipped together. ou can try to carefully pry it apart at the seam. If one side, top or bottom flexes independently a bit at the seam it's probably clipped on. With a thin knife you can check and feel clips in that case.