How do EDDs work with multiple locations?

I am the owner of a fashion company preparing to expand my business operations in the US. I have been utilizing Aftership EDD for some time now and I'm interested in learning how to configure my EDDs to accommodate multiple locations.

 

Specifically, I have two separate locations in Australia and the US where identical SKUs are stocked. In cases where a particular SKU is out of stock at the US location, I would like orders to be fulfilled using available stock from the AU location as a fallback option. I am seeking guidance on integrating this specific logic into my EDD settings.