Hi the problem is that I don't 'have' this system yet, I am waiting until Thursday to order it and I am trying to figure out some stuff in the mean time. Thing right now is that my case can hold 2 extra fans but I know nothing about case fans. So I am kind of lost but I will try to find online manual, thanks!
There are 3 pin locations which you can plug the cord from the fan into. From the pictures those fans seem to have both 3 pin and 4 pin connectors, so you can connect them to the motherboard and have control over their speed, or hook them up to the PSU and they will run at full speed. Do NOT hook them up to both the motherboard and the power supply.
You can support way more than 6 fans on the PSU, you can safely connect 3 or 4 fans to a single molex connector. The fans usually have a male and female molex connector so you can daisy chain multiples together and not have to run all of your strings of molex connectors all over the case.