Sidechaining MIDI tracks with multi timbral instruments?

I have a 16 part multi timbral instrument (Access Virus TI) and have sidechained the first channel to the kick. Then, I’ll add a MIDI track for the second channel but can’t sidechain it to the kick because I don’t have the same options as I do with an instrument track.

So I’m wondering how can I sidechain the MIDI track to the kick?