Drums are expected to be on channel 10, but it's not mandatory that they are, so unless it's exported that way they you can use all 16 on one port for drums.
Note, he said CHANNEL 10, not track 10. Every drum machine I ever had was hard coded to be set on MIDI 10 on boot up. You can move the drums to any TRACK you want. I usually put them on track 1, bass on track 2, just so the foundation tracks are at the top.