Prepare your model separated in multiple .stl files or .amf/.3mf bundle. You can start by using sample objects from our Drivers & Apps bundle. As the sheep pictured above.
Double-click the color field in the Filament menu to assign a color to each filament.
Use the filament colors as you are going to load them into your MMU2S.
If you can't see the Wipe tower in the 3D view, open Print settings tab, select Multiple Extruders, go to Wipe tower and check Enable. You can also adjust its position from here.