Getrag south bend installation

So I recently got my south bend single disk clutch for a swap I am doing. I also got a new flywheel with the pilot bearing already in. In the box with the clutch there is a brass bushing and more hardware with a sticker on it saying only for use with getrag. This bushing fits on the input shaft but not through the bearing on the flywheel, what is this and the hardware for? Thanks in advance

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