Sony SU-W200 Operating Instructions (primary manual) Operating Instructions Manual page 8

Align the screw holes of the stay with the holes
3
corresponding to the desired angle on bracket C, and
secure the stay using the two screws removed in step 1.
The illustration below shows how to align the holes when you choose an
angle of 10 degrees.
Note
Be careful not to get your fingers pinched between the stay and the bracket.
Connect the cables to the TV so that they pass along the
4
sides of bracket B.
8