If you are intending to conceal the patch cord inside the wall, you may also do it by removing the blocks at the center.
Insert the block at the left hand corner (or at the right hand corner if your adapter is at the left) to fill the gap.
Pull the patch cord into the faceplate from centre of the back. Put back the faceplate cover and that is it!
Do not let the connection point facing upward so to prevent dust.