Cubase, SD3 and midi sample triggering

Hi all

Probably an easy question but I have not found a definitive answer.

I use Cubase 10 with SD3 and it works a treat. I also own GA4 and whilst I prefer SD3 I miss the ability to assign midi samples to pads and then trigger them externally so I can hit say C3 and play a drum pattern then hit D3 and trigger a fill.

Does anyone know of a way to do this within cubase with SD3?