SIIG Transport GX21 B5350 - Manual (Page 30)

2.4 Rack mounting
24 Chapter 2: Setting up
Note:
Do not tighten the brackets to the rails as
you will need to adjust their position later.
4. Screw each sliding rail to the side of the Transport GX21
as shown. You will need 3 short, silver colored screws
from the supplied nuts, screws and washers kit, for each
rail.
5. Return the sliding rails to their shortest position.
Note:
When fully extended, the sliding rails
will lock. The release mechanism is located
on the sliding rail as shown. Press the
release mechanism while pushing the sliding
rails to shorten them.