You want to migrate Addresses through the Migration of Leads but notice that the Migration of Leads template does not offer the possibility to maintain Addresses.
Reproducing the Issue
1. Go to Business Configuration work center.
2. Select Open Activity List button.
3. Search and open activity Migration of Leads.
4. Select Migrate leads using the migration tool link.
5. Select You Can Also than chose Download Migration Template link.
Once you open the migration template in Microsoft Excel there is no tab or field where you can maintain an Address.
The Address fields are still not part of the migration template. This requirement will be considered for one of the future release.
In the meantime, you can use the NOTE field for keeping address details.
KBA , SRD-CC , Cross Components , How To