The check was payable to "Cash" and drawn on an account at another bank in the name of business Y? As noted, any connection to X's account is pure fantasy; it did not benefit.
Section A, is either the individual or, if the money was withdrawn for Business Y for operating cash or whatever, Business Y.
Section B is either the individual or "conducted on own behalf" depending who is listed in Section A.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.