Card Guide Removal (Mini Tower): Dell Precision WorkStation 210 Systems
Press in with your thumb on the outer side of the card guide.
This releases the outer tab from the chassis.
Pull the released side of the card guide away from the chassis.
The outer side of the card guide swings away from the chassis.
Slide the control panel cable up out of the slot in the card guide.
With the outer side of the card guide away from the chassis, you can then pull the card
guide back and out of the chassis, which releases the inner two tabs.
NOTE: Some older PCI and other types of cards may be so long that you
cannot remove the card guide until you first remove the cards. Most newer cards are not
long enough to interfere with card guide removal.