Answer
Kinetochore microtubules would probably have minus-end directed motor proteins since these would pull the chromosomes to the pole, to the newly forming nucleus. In contrast, non-kinetochore microtubules would have plus-end directed motor proteins to push the poles further apart.
Work Step by Step
The key here is to see the two activities of the spindle in separating the chromosomes: 1) Pulling the chromosomes apart to the poles and 2) Pushing the two poles further apart.
