Steren BRK-200 Manual De Instrucciones página 10

INSTALLATION OF ADJUSTING KNUCKLE AND EXTENSION
1.- After wall plate installation, put the screws cover on it.
2.- Then insert the extension and / or the adjusting knuckle into the
mounting plate.
3.- Use a hex key to fasten the joints.
4- Secondly, insert the mounting plate of the speaker into the adjusting
knuckle.
5.- Use a hex key to fasten the joints.
6.- The speaker will be mounted correctly.
Extension
ENGLISH-10
Screw covers
Set screw locations
Set screw locations