Which input source to use to pick up the project organization code in mapping set

We are creating project with organization assignment. The organization code assigned to the project header to be pulled to the Inventory Valuation Account > Organization Segment during the Miscellaneous Transaction Event

The organization code on project header does not have one to one relationship.

E.g

Project Organization Code = DFL12=Equipment Resale Netherlands

COA / Organization Segment Value = DFL12

Therefore we need to create a mapping set for the account rule.

Screenshot 1

Miscellaneous Receipt has Inventory Project and Inventory Task entered as below.

Screenshot 2

Full List of Mapping Data to be loaded

Input Output

Which input source to be select so we can refer to the “Organization” on project header. ??