I purchased a new ASUS X99-A motherboard. It has CPU_FAN, CPU_OPT, and CHA_FAN1-4. I understand I connect the fans to the two connector pigtail, then to the CPU_FAN, but where does the pump plug into? I don't have a SYS_FAN as shown in the instructions. Also the pump connector is 3 pin and all the connectors on the motherboard are 4 pin.