Reply to Reloop Terminal Mix 2 & Traktor problem

Hi, I bought Reloop Terminal Mix 2, and I have a little problem with audio settings. So the thing is that now I have my controller connected to computer via usb, of course, and then I have my speakers connected to computer's soundcard, and headphones connected to Terminal mix2. Is this setup even possible or should I connect speakers to Terminal mix too ?

And also I need help how should I put the settings in Traktor pro 2. Sorry I'm really beginner with these things.

Thank you!