IBM ServeRAID User Reference page 30

Figure 5. Inserting a ServeRAID-4H controller into the PCI expansion slot
10. Connect one end of a 68-pin standard cable (separately purchased or already
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IBM ServeRAID: User's Reference, Version 5.10
8. Secure the controller by either tightening the expansion-slot screw on the top
of the controller or closing the latch, depending on your server.
9. Connect the SCSI cables to the controller. If you intend to attach external
devices only, go to step 13 on page 15. Otherwise, go to step 10.
in your server) to the internal channel connector on the ServeRAID controller.
Note: See "Connector locations" on page 4 for the channel connector
locations.