IBM 7947E3U User Manual page 88

18. If a battery and battery carrier are attached to the SAS controller that you
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System x3650 M2 Types 4199 and 7947: Installation and User's Guide
c. Install the SAS riser card with the SAS expander card into the connector
on the system board, making sure that the alignment post goes through the
hole in the expander card. Press the riser card into place until the latch at
the rear of the card snaps closed.
removed in step 8, disconnect the battery carrier cable from the battery and
remove the three screws that secure the battery carrier to the SAS controller.
Set the battery and battery carrier aside.
Note: The illustrations in this document might differ slightly from your
hardware.