How to pass Business Unit for Customer Site while creating Customers using Customer FBDI Upload

Summary:

We are trying to load Customers using FBDI (CustomerImportTemplate.xlsm)

Content (please ensure you mask any confidential information):

We are not able to find which tab/field to be used to assign the Business Units against the Customer Site.

Version (include the version you are using, if applicable):

24A

Code Snippet (add any code snippets that support your topic, if applicable):