You can connect the white connector of the hub to any mb fan header (for example to cha_fan1 header, so you can control all your fans trough changing cha_fan1 settings). It doesn't matter, because this hub has external power through SATA cable, from mb the hub take only control signal. Cons of this method that you will see tachometry signal only from one fan.
English is not my native language, so I'm sorry if I make some mistakes.