channel balance shoe

My old channel balance is marked 2830. It looks similar to the S350-29. However the shoe is broken off and missing. In your online video for replacing a channel balance it shows a metal hook to latch the channel shoe in place but I don't see the metal hook mentioned or shown for the S350-29 with the 15-004 shoe attached. Is there a metal hook on the S350-29? Or does it attach differently?
thx,
Ron