it is still from VOV6
you have a delivery, a delivery has an item category, the schedule line category has an assignment to the item category
the item categories are delivered by SAP:
NLC InterCo stock tr.itm
NLN StandStockTransItem
check the assignment of schedule line category to NLN and NLC in IMG > Sales and Distribution > Sales > Sales Documents > Schedule Lines > Assign Schedule Line Categories
then go into VOV6 and see the movement types in the schedule line categories