Find a star in the TV, set up the TV in the dome so that you can see it from the ladder. Now pin the pod, screwing opposite pins until you see the star move. Try to keep the star in the same place. The fit is done by walking randomly in parameter space and monitoring the merit function. Each time the merit function improves the size of the random step is reduced.
TV is set up with N at the bottom and E to the right.
A negative x-tilt requires tilting to the West. A negative y-tilt requires tilting to the North.