You can easily add additional billing emails and a billing email cc to each location on a customer's account, with just a few steps:
1. Open up the customer's account
2. Click Edit Customer
3. Add an additional contact and include their email.
4. Click on the location.
5. Click the '+' to the right of the billing email field and select your contact's billing emails.
Note: You can add up to 3 emails in the Billing Email field.
You can also add a contact's email to the Billing Email cc field as well.