Why is Customer Site Location number used instead of the customer Site number for Bill/Ship To quali

Summary:

Why is Customer Site Location number used instead of the customer Site number when selecting Bill To or Ship To as qualifier for Customer Promotional program?

Content (please ensure you mask any confidential information):

When selecting a Site for a bill To, the customer site location is used instead of the customer site. This makes it confusing for the users. Why is it using location number versus Site number?

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

25C

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