Unfortunately, that is not possible, as the kits are preset.
The only way to find the sounds is to check the sound list and see to which key are the specific drum sounds assigned. Rhythm set sounds are shown on page 20:
https://static.roland.com/assets/media/pdf/RD-2000_Sound_List_eng02_W.pdf
The editable parameters are "Tempo", "Volume" and "Output". For each rhythm pattern a recommended drum kit will be selected.