IBM SAN Volume Controller 2145-CG8 Hardware Maintenance Manual page 120

Figure 77. USB service-controller cable connected to the disk controller and USB riser card (SAN Volume Controller
2145-CF8 shown)
1 USB connector on the disk controller and USB riser card
2 USB cable
c. Grasp the blue lockbar ( 2 in Figure 78 on page 91) and slide it toward the USB riser-card
assembly ( 3 ) to the unlock position and remove the USB cable ( 1 ) from the connector.
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IBM SAN Volume Controller Hardware Maintenance Guide