On the standard drum machines that come with SX there should be an output channel parameter you can change. I'm at work right now so can't tell you exactly if it is a knob, slider or input box. You should be able to see it. Selecting a sound like the kick and changing the output value to say 2 will put the kick out to the 2nd channel that the drum machine has allocated itself in the mixer. NOTE: you won't see this as an additional track in the multitrack view only in the mixer. Maybe there is something you can do to get a separate track appear in the multitrack view but I dunno.
I use battery anyway so my memory is quite hazy with those others. With battery you can specify the output channels per sample as well including a couple of stereo outputs.
Hope this helps.
