Connecting H105 pump to PSU??

It has been recommended to directly connect the H105 pump directly to the PSU and since there are enough empty connections on the Seasonic PSU -- what kind of adapter do I need to connect the H105 pump's 3 pin female connector to a 6 pin or 8 pin connector on the PSU? All of the fan headers have been used on the motherboard and I would rather connect the pump to the PSU than add the Asus auxillary fan board just for one connection. Hope that made sense.



Thanks



Mike