your computer might look different slightly different than the one shown.
do the following to install the u-bolt:
1.review the safety precautions listed in "safety information" on page vii.
2.turn off the computer and all attached devices. disconnect all external cables and power cords; then remove the cover (see "removing the side cover" on page 32 for details).
3.use a screwdriver to remove the two metal knockouts.
4.insert the u-bolt through the rear panel; then attach and tighten the nuts.
5.thread the cable through the u-bolt and around an object that is not part of or permanently secured to the building structure or foundation, and from which the cable cannot be removed. fasten the cable ends together with a lock. after you add the security cable, be certain it does not interfere with other cables connected to the computer.
6.reconnect the external cables and power cords, and turn on the attached devices,then the computer.