So…your drumkat should output on PERF channel (that you can set in the Midi config).
I use channel 12.

Anyway: i tell you my setup with an Akai MPD24 to trigger drum patches (that you can adapt to your needings)

I access one A4’s Track at a time.
Building the pattern for that track - then moving to the next one…

So: MULTIMAP settings for having, say, 128 sounds triggered by 128 different midi notes

• create a new entry
• function, Int Trig
• range low, C0
• range hi, the highest note
• track, Auto
• note, C3 (let’s say those drum patches don’t have Keytracking)
• note inc, 0
• sound slot, 1
• sound inc, 1

This way you should be able to send from note C0 till the 128th midi note then triggering the 128 sound slots on the focused Track.