IBM System x3500 Installation And User Manual page 110

7. Install the battery:
92
IBM System x3500 M4 Type 7383: Installation and User's Guide
Attention: Make sure that the cable is not pinched and does not cover any
connectors or obstruct any components on the system board.
a. Align the battery cable connector with the slot on the battery holder. Place
the battery into the battery holder and make sure that the battery holder
engages the battery securely.