Fans or radiators go in the front. they are mounted to a simple rectangle of plastic and then the plastic is stuck on with screws to the front of the case. It's actually a very simple setup, just required some time in the cutting process.
As for drives. Double sided tape is your friend (as seen with my SSDs in the third picture). You can also mount them at the bottom of the front of the case as you will never see them there.
I have 4 desktops in my house and only one has the hard drive mounted in the drive bay.
Also, the following configuration of fans will not work. I initially wanted to use a 240mm rad on the front of the case and keep the lower 200mm fan but the two didn't have enough clearance to fit at the same time. That's what made me decide to go with the three fans.