Customer Hierarchy in BW

Hello Experts!

I need to load Customer hierarchies in BW from ECC.

I read the messages on this forum and learned that there are 2 customer related datasources:

0CUST_SALES_LKDH_HIER and 0CUSTOMER_LKLS_HIER

I don't get any data in rsa3 for 0CUSTOMER_LKLS_HIER. I have to chose the Customer Class.

I get data in rsa3 for 0CUST_SALES_LKDH_HIER and that matches KNVH data in ECC.

0CUST_SALES_LKDH_HIER will map to 0CUST_SALES, right? So is that ok if I use this datasource to bring customer hierarchies into BW?

Or should I use 0CUSTOMER_LKLS_HIER. In that case, how do I get that populated in ECC? I need functional person's help, right?

Any help would be greatly appreciated.

Thanks!