Radiator - which way to turn to disconnect radiator

I need to disconnect this radiator so I can get to the plumbing behind the sheet rock.

I believe I have to hold "B" still with a wrench and also turn "A" with a wrench at the same time. Which way do I turn "A" with the pipe wrench - in direction of "22" or "44"?

I tried both ways but it won't move.

Thanks