IBM T220 User Manual page 28

5. Hook the digital signal cables to the cable clamps.
6. Turn off your personal computer or workstation and all attached devices.
7. Open the cover of your personal computer or workstation, if necessary.
8. Connect the end of the digital signal cable marked #1/#2 to the the video
8
graphics card connector marked #1/#2 on your personal computer or
workstation, and tighten the screws. Likewise, connect the cable end marked
#3/#4 to the connector marked #3/#4. If you have the cover of your personal
computer or workstation, close it now.
Cable clamp