Hi Guys,

I am bit confusing about data import with multiple data entities for customers and my contacts. i have added the  customers V3 and entities and customer contacts.

as shown in below screen , added multiple how systems know the relation between these entities... 

1. I am planning to import 10 new customers and 3  contacts  per customer.

2. Add the data in Excel sheet 1 has customers data

3. sheet 2 has customer address.

4.how system knows the relation between two sheet.

 did i missing anything please confirm.