We don't support preferred seating for Cake... yet.
So don't use it, and stay seated in whatever random seat position Cake seats you.
Actually Pat, it looks like HM2 supports preferred seating. I setup the new Lock client with my preferred seating, and in HM2 as well, and my HUD locates everything properly. Granted I've only played 6-max games so far, so can't speak to 10-max or HU.