Which tailpiece do I use for the AD993-R or the AD993-M?

In the AD and CO Series replacement parts guide it shows the same part number 46929295 for the 993R, 993S, and 993M.
The pictures show that the 993R and 993S have a flat straight tailpiece and the 993M has the square style tailpiece.
The Tailpiece kit contains both the straight flat tailpiece and the square style tailpiece.
AD Service Manual can be found.   HERE
CO Service Manual can be found.    HERE


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