How should I connect my studio monitors to my Dm4800?

[Amirou]

Hello. I would like to know how to connect my 3 pairs of studio monitors so that I can control the volume of each pair separately with the faders on the DM4800. Therefore, I need to connect the stereo outputs of my Apollo to inputs on the DM4800 and my 3 pairs of monitors to outputs. But which inputs and outputs on the dm4800 should I use? And what setup should I do on the DM4800? I would like a detailed explanation. Thank you.