Yamaha RM-CR Manuel D'installation page 18

2.
Provisionally install the two included screws into the front holes of the mounting
accessory attachment holes of this product.
When doing so, leave a gap of approximately 2 mm between the side of the unit and
the head of the screw, so that the screws can engage the metal fixture.
3.
Slide the unit so that the screws you provisionally installed in step 2 engage the
slots of the metal fixture attached under the desk.
4.
Tighten the four screws in the attachment holes of the mounting accessory.
Screws
18
RM-CR Installation Manual
Screws
Metal fixture