You connect all check-in desk, stands and reclaim area to each other on the baggage bay. So you choose which stand connects to which bay, and which desk to which bay. So eventually, which group of desk to which group of stands.
1 belt can be used and at each exit to specific destination you place a tilt tray. You set the tilt tray to “to destination” and then the bags go left right or straight true, depending on the connections you made when you connected them, the tray knows this.
Be careful with overloading the belts or delay will happen.