Essentially, you can throw (the same) uke in the opposite direction of the attack, i.e. behind him, in the same direction as the attack, or to either side of the attack (from the same side that you are on).
In actuality, it can be in *any* direction... probably easier to show than explain in writing...
I agree with this description. The mechanics of what is happening tracks the cross-wise motions of happo undo to produce smooth elliptical curves of entry and throw, as with the Trammel of Archimedes: