Item Consigned in one INBU and not in another INBU

My organization is trying to configure multiple Inventory Business Units (INBU) with items that are consigned in one INBU but not another. The Define Business Unit Item pages enable an item to be consigned in one INBU but not another. Automated system replenishment is causing an issue.

The replenishment from the Consignment INBU is not utilizing the Vendor and Vendor Location entered for the item in Define Business Unit. The replenishment requisition is going to the Priority 1 Vendor and Vendor Location from the Define Item page. This does not match the Vendor Location for ordering the item as consignment.

How should the system be configured to have the Consignment INBU use one Vendor and Vendor Location on replenishment requisitions and a different Vendor and Vendor Location for the non-consignment INBU?