Ensoniq SQ2/32 - Song Select via MIDI?

I am trying to get my SQ2/32 to recognize Song Select through MIDI. I’m using Set List Maker on an iPad 2, using a Uno USB MIDI interface. I can transfer internal voices, and sequences/songs in either direction, but I can’t select a song/sequence from the app. Everything else seems to work fine.
SYSEX is on, Song Select is on. The MIDI implementation chart shows it’s recognized, I just need to know what bytes to send along with the song/sequence number. Any help is appreciated!