In terms of mechanics it's not dissimilar to how one might do a rolling arm bar from the back; in fact, Nolf has used this move in exactly that manner in some of his matches to turn his opponent over while in top position.
And of course, just like that move complex, you can use essentially the same opening to transition into a north/south double wrist lock or mounted triangle or mounted guillotine/nelson hold as well, depending on your particular speciality. (The latter in fact again being a favored method by Nolf when finishing this move for a pin.)