SetIndex missing

In the API documentation there is a function setIndex (id/newIndex) but this function do not exists in Kanban. How I can set a Index or Position of a new card inside the Kanban board?

Problem description:
If I add a new card with Add function, the card is always at the end of the list. If I move a existing card to a new status, the item is at the position where I drop the card. My hope was to set the position with setIndex.