IBM BladeCenter HT 8740 Problem Determination And Service Manual page 88

5. Install the high-speed I/O-module interposer into the BladeCenter HT unit (see
70
BladeCenter HT Type 8740 and 8750: Problem Determination and Service Guide
a. Install the interposer card on the upper interposer tray:
1) Be sure that the connectors on the interposer card are oriented as
shown in the illustration above.
2) Align the holes in the interposer card with the standoffs on the tray;
then, secure the card to the tray using the supplied thumbscrews.
b. Install the interposer card on the lower interposer tray:
1) Be sure that the connectors on the interposer card are facing up, the
opposite of what it is in the illustration above.
2) Align the holes in the interposer card with the standoffs on the tray;
then, secure the card to the tray using the supplied thumbscrews.
"Installing a high-speed I/O-module interposer tray" on page 67).