GTM 2LIS_46_ITM extraction

Hi all! I'm having a kind of a business issue when trying to extract data from 2lis_46_itm to BW. I'm using OLIG and OLIGBW to fill setup tables but there are certain documents/contracts I can see in tables WBHK and WBHI that are not extracted when testing datasource in RSA3.

I've seen a message saying that these extractores just take care of "contract type is relevant for the BW update" so I wonder who and how defines contract types relevant for BW update.

Anyone can help?

Thanks a lot!