Do we know which way up the drones stand relative to the outer hull on a cube? If the (presumably artificial) gravity goes toward the centre or the "walls", do we know what the experience of walking across an edge is?
As far as we've seen, the entire cube seems to have a single orientation. And there's no real reason to suspect otherwise. Virtually every other vessel in Star Trek uses a "one-directional up" configuration, thanks to artificial gravity. Thus, no need to walk around the edges.