Field help (SALCNTNAM)

This is the name of the contact associated with the delivery address. If the delivery address corresponds to the delivery address in the document header, the contact suggested by default on the line is the contact entered for the delivery address displayed on the header.
If the delivery address does not match the delivery address mentioned on the document header, then the contact suggested by default is the business partner default contact if it corresponds to this delivery address. Otherwise, the system suggests the first contact of this address by alphabetical order on the contact code.

The quote lines applying to non-deliverable products are not impacted by this information.