When I took the rear brake cylinders off the car the dust seals were not present (probably rotted out in the barn). My original Haynes appears to show the seal between the backplate and under the cylinder slide-in locking fittings. The Moss catalogue shows the seal over the top of those fittings. Which is correct? If it is over (per Moss) then the opposite end from the handbrake lever would appear to just flap in the wind.