Lanner NCA-4020 User Manual page 56

9. For the rear rack installation, slide
the rail to aim and engage the bolts
on the rail's rear end with the two
available holes on the post, and the
rail assembly will click into place.
10. Stretch both of the Inner Rails out
to their fullest extent. You will
hear a click sound when they are
fully stretched and locked.
11. Hold the system with its front
facing you, lift the chassis and
gently engage the brackets on
the system while aligning them
with the Inner Rails as shown in
the image, and then push the
system into the cabinet.
56
Click
Click
The Inner Rail will click
when it is fully stretched.