We are implementing the Trade Sales for a specific business case, but we were not able to find any link between  Po shipper ID and Customer SHipper ID. The Customer shipper is automatically created once the Supplier Shipper is loaded in the system, this is working fine, but for invoicing purposes we need to know the Supplier shipper Id connected to each Customer Shipper, as it is the only reference the customer knows to match the invoice we will deliver.

Does anybody know where we can find this relation/cross-reference between the Supplier Shipper Id and the corresponding Customer Shipper generated automaticaly by the Trade Sales?

Thanks in advance.