IBM Power System 9040-MR9 Manual page 65

Figure 52. Locking the system processor module into the tool
d) Hold the sides of the tool with system processor module and carefully lift the tool out of the
system processor module tray.
e) Lower the tool and system processor module onto the socket. Align the beveled corner of the tool
with the beveled corner on the socket. Align the guide pins (A) with the alignment holes (B) on
each side of the tool. Use care to lower the tool evenly without tilting the tool.
Refer to the following figure.
Note: Do not attempt to slide the tool and the system processor module in any direction while the
system processor module is touching the socket. If the tool and the system processor module are
not aligned with the guide pins, lift the tool and the system processor module and reposition
them.
System backplane for the 9040-MR9 51