IBM x3550 M4 Type 7914 Installation And Service Manual page 232

Figure 111. RAID adapter battery or flash power module cable connection
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IBM System x3550 M4 Type 7914: Installation and Service Guide
Attention: Make sure that the cable is not pinched and does not cover any
connectors or obstruct any components on the system board.
7. Remove any cable covering or obstructing the holder before opening the
holder.
8. Install the battery or flash power module:
a. Release the retention clip in the open position.
b. Align the cable connector with the slot on the holder. Place the battery or
flash power module into the holder and make sure that the holder engages
the battery or flash power module securely.