If you have access to the Organisation Relationship destination, you can create a mapping that will allow you to link an address to a constituent's Primary Business record (or any other organisation relationship).
First, you'll need to map the Organisation Relationship on the respective tab in Importacular.
Make sure that you've marked this relationship as both the Employer and the Primary Business relationship:
(Note that the checkbox for "Is Contact" appears in a neutral state, while both "Is Employee" and "Is Primary" are checked.)
Once the relationship is mapped, you can add an address to the relationship. Go to the Address tab and create an address.
In the upper right hand corner of the screen, select the Organisation as the record to link to this address.
If you would like this address to be unique to the relationship (rather than updating the Organisation record), you will need to use the Address Area Settings to select that option.
