Two red wires from the fans go to the yellow wire of the molex.
Other two black wires of fans go to the black wire next to yellow wire of the molex.
Besides, can power supply handle two SATA hard disks and two 12V fans on its own?
(this set up is not yet soldered and will be soldered and all the ends will be wrapped safely before booting the system)
Edited by jonathanmrk, 19 June 2017 - 03:17 AM.