Intel BOXD850MVSE Quick Reference Manual page 17

Follow the steps outlined below to attach the AGP RM (A) to the AGP
connector (B):
1 Locate the AGP connector on the board as shown below. Note that the
board's silkscreen (C) indicates the correct final position of the lever
(D) on the RM.
A
D
E
C
2 Position the AGP RM over the AGP connector as shown below.
3 Push the lever end of the AGP RM in the direction of the arrow until the
two rearmost tabs (E) spread over the end of the AGP connector.
4 Push the free end of the AGP RM over the other end of the AGP connector
and press down evenly on both ends of the AGP RM until all four tabs
click underneath the AGP connector. Do not apply unnecessary pressure to
avoid damaging the board.
B
OM10180
OM10181
OM11842
OM10111