Nidek LE-9000SX Safety Bevel ASSY Replacement Issues

So the optical shop got a new safety bevel part to replace the one we have, however no instructions were sent with the part as there normally is so we’ve hit a wall. The case that the spindle assembly sits in was not with the new part and we cannot figure out how to take it off to put onto the new unit. Does anyone have a video to reference or can walk me through how to remove it and shift it over
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photo is upside down but you get the idea..