How to display parent field on sub panel record?

I have a module DC Credit Request and it has fields related to the Distribution Centre one being the name of the DC.

I also have a one to many relationship with the Item Credit Line which is a sub panel on the DC Credit request module.

I would like to display the name of the Dc for each of the Credit Lines (credit lines are for products they want a credit for). I dont want the end user to populate the line item DC name I want it to populate automatically (or show from the parent record). One of the reasons for this when users search on Credit Lines based on a product obviously there can be multiple DC's with credit requests for the product. Any suggestions would be good. Hoping its not a code fix.

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