I created a hierarchy using the smartart. I want to be able to do more with the connectors.

However, the connectors seem locked in place and not movable.

the issue I am having is I want the connector to go from the middle bottom of the upper box to the middle top of the lower box. but it is currently going from a random place on the bottom of the upper box to the left side of the lower box.

without adding a new box, how do I move whe connector when it is locked and not giving me any controls.