IBM SY27-0345-06 - Manual (Page 73)

Figure 4-27. Removing the Screws from the Power Supply (14T and 24x Models)
2
Remove the connector to the system board by pulling out the retaining clips
with your fingers or a screwdriver and then rocking it from front to back as
you pull up.
Chapter 4. Removal and Replacement Procedures 4-23