hi, the correct way to do this is you have to take each cable out and rearrange them in this order, black, red, white, blue. that allows it to work and control it through PWM. to pull the cables out you need a small screwdriver. you find the metal clips that hold the cables into the plastic and push them in while pulling up and to put them back in bend the same pin up and push it in.
goodluck!!
P.S those fans are amazing but crazy loud!!