SD_SALESDOCUMENT_CREATE : VBAP-KWMENG field

Hi Guyz..

I'm trying to create a Debit Memo using this Function Module.

I have to populate the order quantity (VBAP-KWMENG field) at the item level.

But I can't find it in the SALES_ITEMS_IN table structure.

Any ideas here as to how to populate this field?

I've looked at all other BAPIs but this FM is the closest match for all the fields I need to populate. Other BAPIs have more fields missing (like Tax Classification etc)

Thanks!