~snip~
As long as they're 3-pin fans, they will plug straight into the hub's fan output - that will run them at full speed. To run at roughly half speed (5V instead of 12V) you can solder them to the end of a USB cable and plug them into USB. But you could also use a Noctua low-noise adapter instead, that is usually shipped with them.
Keep in mind if they're 4-pin, you will need a PWM fan controller of any kind.
As long as they're 3-pin fans, they will plug straight into the hub's fan output - that will run them at full speed. To run at roughly half speed (5V instead of 12V) you can solder them to the end of a USB cable and plug them into USB. But you could also use a Noctua low-noise adapter instead, that is usually shipped with them.
Keep in mind if they're 4-pin, you will need a PWM fan controller of any kind.
Noctua has its own PWM fan controller, and it's awesome. The NA-FC1, it works really well. You can connect multiple fans to it, runs off 12V, you can control the fans either with a PWM signal or by hand turning the knob, and it takes very little space:
you could get a Noctua NA-FC1, 4-Pin PWM Fan Controller