Dell Precision T5400 (Late 2007) - Manual (Page 198)

198 Adding and Replacing Parts
11 Before you close the card retention door, ensure that:
• The tops of all cards and filler brackets are flush with the alignment
bar.
• The notch in the top of the card or filler bracket fits around the
alignment guide.
NOTE: For extra security, remove the alignment guide (an upside-down
screw) and screw it in right side up to secure a card.
1 card fully seated 2 card not fully seated
3 bracket within slot 4 bracket caught outside of slot
1
2
4
3