Follow the removal directions in reverse.Before returning the mirror to its cell, wipe its back with lens tissue using alcohol if necessary to remove dirt and gunk. Also vacuum out the cell and wipe down the whiffle pads and transverse supports to make sure the mirror will sit properly in the cell.
Using the procedure for measuring the mirror edge depth described in the removal instructions, set the mirror edges to be exactly 4.555 inches below the reference plates. The adjustment is made with the three screws showing under the primary cell; those screws under the whiffle supports. You'll need to iterate a few times to get all the points to the correct depth.
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