Both panels have sun sensors and are pointed. They extend on the Y axis (broadly speaking, North-South)
Because of the position of the booms, only the wing on the sunward side can be tilted to face the sun.
The report on testing showed the panels at a different rotation and mentioned pitch and roll.
There is no need for the wings rotate around the Y axis more than around 180 degrees (or so), as they can be rotated back to the starting position during the night portion of the orbit, which would allow the power and data connections to be far simpler.
I assume the panels are articulated at their centre of mass to minimise the effect pointing the wing has on the spacecraft attitude, and to minimise the torque needed to move it.