After you have mapped the Clients and Sites, you can use the Location tab in the Map2BOB window to link/unlink ERP Contacts with BOB Contacts. You can also create a new BOB Contact.
When you open Map2BOB, your ERP Customers and Locations display, with each Customer Location on a separate row. Select the ellipsis icon to the right of the BOB Site and then select Manage Contacts to open the New Contact window.