audit objects to check who updated the Contact in the Bill to level

Summary:

Could you please let me know which object and attribute should be enabled under Manage audit policies to check who updated the Contact in the Bill to level.

Navigation to the page is : Receivables -> Billing -> Manage Customers -> Serach for the customer -> Account site contacts.

Content (please ensure you mask any confidential information):

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

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