Yes, it will return these numbers, which are the coordinates of the message window. These commands will not change the position of the face window.
Now you need to use the coordinates to set the position of the face window where you want it to be, which is on the top right of the message window. Now is just a matter of math. If you want the face window to be on the top right of the message window, then you need to get the width value of your game resolution and subtract the face window width from it.
If your game is 816x624 and your face window size is 144x144, then you do 816-144 for the X position.
For the Y position, you need to get the Y coordinate from the message window and subtract using the height of the face window.
The other way for doing that is by using trial and error. Set an X and Y value on the plugin parameters and then keep trying until you find the right spot.