I’m good with the idea that the shuttle is coming from the opposite side of the DS2.
Yeah, and that would explain why you can’t see Endor from the throne room.
Good point.
As for the throne room, it all depends on where the spire is. A 2017 thread on TFNJCF says the answer is the North Pole, which makes sense to me, and they cite some source. Given the relative size (DSII is much smaller) and distance (and orbiting quite close) of the two bodies, I’m still not convinced that you’d never see Endor out the windows, but maybe 🤷♂️