IBM x3690 X5 Service Manual page 388

The following illustration shows the cabling information for the scalability LED
cable. Make sure that you run the cable through the loops on the side of the drive
cage next to operator information panel; then, connect the cable to the scalability
LED cable connector on the system board:
370
System x3690 X5 Types 7147, 7148, 7149, and 7192: Problem Determination and Service Guide
Cable Scalability
loops LED cable
Top cover/
power
shut-off
switch cable
Operator information
panel cable