MASS UPDATE POD Auth Group field: EUITRANS-BEGRU field change

I have a requirement to mass update        the Auth Group field of the PoD. 

See image below.  I thought this field is  EUITRANS-BEGRU  ? OR am I wrong ? as I don't see the value persisted in the field, when populated.

To mass update, there are different options:

1. BDS
2. EMIGALL
3. ABAP

So if I use EMIGALL, then the PODCHANGE object does not have the BEGRU field.  What should I do in this situation?  Thanks!!!