The "1 day" rotational period is to give a natural-seeming day-night cycle, using natural sunlight from the star that the whole structure orbits.
It would be oriented so that the sun appears to rise just to the side of the ring - When it's overhead the arc of the ring would appear to be near the sun, but not eclipsing it. This is nearer to vertical than the sun over much of Earth much of the time.
It would be oriented so that the sun appears to rise just to the side of the ring - When it's overhead the arc of the ring would appear to be near the sun, but not eclipsing it. This is nearer to vertical than the sun over much of Earth much of the time.