To add to Trisch's comment:
If turn the plate clockwise doesn't do the trick, the hooked piece on the lower right comes off when you pull the plate towards you a tiny bit. Still, watch out not breaking that ribbon the hooked piece is behind of.
Note that the antenna cable goes around the the right side of that little guiding hook/finger. On the photo it shows the cable on the left of it. The hook is almost right below the socket.