How to upload customer site for existing customer using Customer Import

Summary:

Hi,

Can anyone please suggest if we want to load new site for existing 'PERSON' type customer, which sheets and what details can be populated.

Attached is the sheet for reference.

Content (please ensure you mask any confidential information):

Already provided reference of Party orig system reference from HZ_PARTIES, still getting below error -

You must provide a valid reference to the party.

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

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