Apple Mac Pro - Manual (Page 37)

Chapter 3 Working Inside Your Computer 37
8 Push the latch down to secure the side panel.
While pushing the side panel
against the computer, push
the latch down until it is firmly
secured against the back
of the computer. To lock the side panel or
secure the computer, flip
down the lock tab before
you close the latch. This
provides a metal loop
through which you can
attach a lock or cable.