This cable allows you to use one of the 4 pin ports on the RGB fan hub to connect a standard ARGB product, for example: ARGB fans.
Corsair RGB Fan Hub to Corsair RGB Strip Adapter
50cm Corsair RGB Fan Hub to Standard ARGB 3-pin 5V Adapter
Corsair RGB Fan LED Hub Six (6) port - Taken from Brand-New SP120 fan kits
Corsair 4-Pin RGB Fan Hub to Phanteks/Lian-Li/Light Strip JST-SM ARGB Adapter
30cm Corsair 3pin RGB Fan Hub to Standard ARGB 3-pin 5V Adapter
ARGB Splitter Cable, 12 V 4PIN Addressable RGB Fan Hub/Splitter, 1 to 3 Splitter Cable Y Cable, for Case Fan Splitter Cable Extension and CPU Cooler (Black)