Session Horns Pro Sound Variations in Studio One

Sorry — I believe the "Sound Variations" thing is just their name for articulations, but maybe I need an Studio One wizard here. . .
Can someone please tell me the secret to adding an articulation/sound variation to the ones already set up in my DAW (see screenshot)? The variation I want to add is one that's built in to Session Horns Pro. It's called "PoPiCre 4Beat" and I can access it the normal way, but I'm not a keyboard player and hitting the keyswitches while recording live is above my pay grade. The keyswitch is A-1, but when I add it and apply it in the piano roll, it has no effect. The other articulations work, but they are from a file I downloaded and I have not been able to figure out how to add to it.
I should add that I'm using the Kontakt Player and Studio One Pro 7.2 on a PC.
Many thanks if you can help me here.
—Larry Jones
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