Gigabyte GS-SR102 System Installation Manual page 10

System Installation Guide
For CPU1, Fan power cable connect to J13 (CPU1 FAN)
connector and for CPU2, Fan power cable connect to J15 (CPU2
Fan) Connector. Note to make sure the connector is plugged into
the header in the correct and firmly seated. (Fig-8)
J13-CPU1 Fan Connector
Fig-7
J15-CPU2 Fan Connector
Fig-8
3-4