As I said, I think it has at least 8 assignable outputs. This is, of course, dependent on your hardware (ie. soundcard) being set up properly within Cubase so that the program "knows" that they are there.
At the bottom of each channel, there is, by default, the word "master" which tells you that the channel is routed to the master bus. Click on that, and it will give you other options to where the audio can be sent (ex. aux 3, or whatever...)
Chris