Use the 4 pins connectors. 3 and 4 pin connectors fit each other.
Make sure where Corsair says 4 pin you use the cpu fan header. That's what they assume is 4 pin. usually the case (or radiator) fans were 3 pin. Its now more common to see 4 pin connectors everywhere.
Im pretty sure that the board has two 4 pin cpu fan headers so im just gonna use those and thank you for the help