API to associate a supplier address to contact (R12)

I need to associate a supplier address to a supplier contact. Is there an API for this?

I tried using ap_vendor_pub_pkg.update_vendor_contact_public and associating "lr_vendor_contact_rec.org_party_site_id" to the party site ID, but I see this in the log file after the API is executed which can only mean it doesn't like it.

return_status: U

msg_data: SQLAP+---------------------------------------------------------------------------+

I know it's possible with that API to update the supplier contact, but is there anyway to update the contact to associate to an address?

Thanks!