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IBM System x3550 M3 Types 4254 and 7944: Installation and User's Guide
6. Install the interposer card in the interposer card connector on the RAID
adapter:
a. Remove the interposer card and the screw from the bag.
b. Rotate the plastic standoff on the interposer card so that it aligns with the
hole on the RAID adapter; then, align the connector on interposer card with
the interposer card connector on the RAID adapter.
c. Press the interposer card down onto the interposer card connector on the
RAID adapter until it is firmly seated.
d. From underneath the RAID adapter, insert the screw that you took from the
bag and tighten the screw to secure the interposer card to the RAID
adapter.
7. Connect one end of the remote batter cable to the interposer card.