Two racks on one end (Southernmost) of the cab car. They removed one bench and slid the original rack southward to fit them both in. You can see that people are using the bench facing the racks, unlike the first gallery cars that had benches facing the racks, these protect the rider from the bikes via the cage on the rack, and there's actually pretty decent legroom - better than in the other seats. One more rack on the North end for 24 total slots.
And they said it could not be done. Over, and over, and over.