Add new fields at BSID & BSAD table

Hello Experts,

We need to have additional fields at BSID and BSAD table.

So, I looked around the solution for this requirement but couldn't find a proper answer.

I have read SAP notes 62435(F-03 : Selection by purchasing documents) and 410799(Enhancement of line item extraction FI-GL, FI-CIS, FI-CIS) but I am not sure whether these notes is good enough for my case.

Please let me know how I can add new fields at above two tables.

Thanks in advance.

BR,

Chris