How to assign trigger pads on Halon Sonic 2

Whats good guys,
I’m new to the program and I have an AKAI MPK mini 2 and Cubase 8.5. If I add an insturment track that’s Halion Sonic 2, I can’t figure out how to assign my pads different sounds. It’s just a 25 key keyboard with 8 pads up top but I can’t figure out how to choose which sound comes out the pads even if I go to “assign trigger note” and select the sound I want.

Any help would be greatly appreciated.