p182 fans help quick!

[Shash]

Hi I'm building a comp right now, I'm replacing the stock tricool fans with noctuas, but I forgot to note down which way they face! I figured the top and rear fans blow outwards, but I have no idea what the bottom one does, does it blow towards the rear or front?

 

[Shash]

Another quick one I have a corsair hx620, should I mount it fan up or fan down?

 

[Shash]

found pictures of it mounted up, but I think having the air blow towards the other fans makes more sense?