Hi Virgilo,
If you are already using ECC on HANA then check the ECC schema - it will have all your tables already.
Just log on to HANA Studio using Admin user and check the catalog and your ECC schema should be there.
Run the below command:
SELECT * FROM M_CS_TABLES - it will show all tables present in HANA and from there you can get the schema name where your ECC tables are stored.
Regards,
Vivek