How to Select Customer and Customer Site associated to Organization in Maintain Supply Network Model

We currently associate destination organizations with the "All Other" customer. Due to this setup, inter-org transfer orders aren't being considered as history in our Plan.

Oracle has advised us to associate the destination organizations with a valid customer and customer site. How have others implemented this requirement? Is it standard practice to create an internal/dummy customer specifically for replenishment or inter-org transfer history, with customer sites representing the destination organizations?

Any guidance or best practices would be appreciated.