guidelines for customer addreses

Summary:

Hello,

As per the guidelines for customer addreses:

https://docs.oracle.com/en/cloud/saas/financials/25b/fairp/guidelines-for-customer-addresses.html

"When you create additional customer accounts for the customer, you can either enter new address information to create a new account site, or you can use an existing account site"

However, when creating a customer via the UI there is only the option to create a site and not to assign an existing site. How is an existing site selected when creating a new customer?

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