How to configure back to back in case of two business units? (Make Case)

We have a requirement involving two business units and inventory organizations:

• Business Unit A / Inventory Organization A: Sales orders are booked here, and demand is generated from the sales order.
• Business Unit B / Inventory Organization B: Manufacturing is performed here to fulfill the demand generated by the sales order in Business Unit A.

Please note that the item on the sales order line is the same item configured as the primary output on the manufacturing work order.

How should I configure the supply enrichment rules and sourcing rules to ensure that the correct supply order is created and linked to the sales order demand?