The ones I've seen require drilling into the fence body. Alternatively, you could build an auxiliary fence to fit over the SawStop fence with a featherboard attached to it. The aux fence would also be useful as a tall fence for cutting angles with the piece on it's end. Check out the Fine Woodworking article on
Bob VanDyke's fence system.
https://www.finewoodworking.com/membership/pdf/27802/011231056.pdf