Not all weight distribution systems come with sway control. Sway control is usually a good idea, but if you do not experience much sway when you are towing, then you do not need to add it.
If you want to add sway control, then you may be interested in the Friction Sway Control Kit, # 83660. The head of your weight distribution system must have an additional ball hole to the side of the main hitch ball to accommodate the sway control bar (see photo). I have attached an installation video... view full answer...