IBM 8480 - Eserver xSeries 205 Maintenance And Troubleshooting Manual page 86

8. Remove the extender card screws.
9. Disconnect the extender card connector from the system board edge connector:
then, tilt the extender card and remove it from the server.
To install an extender card reverse this procedure.
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IBM xSeries 205 Type 8480: Hardware Maintenance Manual and Troubleshooting Guide