Can we map Subscription Parties Contact Email to AR Interface via Service Mapping?

Hi Team,

We need to send Contact Email (free text) from Subscription → Parties tab → Contacts → Email into the AR Interface table RA_INTERFACE_LINES_ALL ) for each invoice/credit memo line created from Subscription billing.
What we observed:

In Service Mapping → Sources → Subscription Management → Entity Mappings, the available entities are only:

"Subscription, Products, ProductAssociations, BillLines, Charges, HeaderSalesCredits, ProductSalesCredits, ARInterface"

There is no Parties/Contacts entity available.

Also, Inherit from Services only shows SubscriptionManagement and doesn’t expose Contacts/Parties.

Is there any supported way to bring Subscription Parties/Contacts into this integration and map the Email into AR Interface attributes?