Until there is a SU ruby to point components, the following:
Pointing light fixtures: Insert the fixture, draw a line from the origin of the fixture to the target, then draw a line from the target to the other endpoint of the fixture, and close the endpoints creating a reference surface. Select the fixture to rotate, align the rotate tool with the reference surface, identify its axis from its origin to its opposite endpoint of the fixture, then rotate the fixture along the line of the reference surface. Delete the reference surface when you are done.
Please delete post when not required.