Install Sound SIMMs

1. Power off the unit and disconnect the power cord.
2. Remove the cover (or access panel) to reach the SIMM sockets.
3. Install the 16MB or 32MB Sound SIMM(s) into the available sockets.
4. Replace the cover and power on the unit.
5. The new ROM presets will be automatically added to the preset list.

Source: Vintage Pro — vintageproownersmanual (manual)