I cannot verify right now, but I think its is AC_DrawingRect[5] which comes from the AC_DrawingRect Variable (should be a blue Variable in your Parameters), the first 4 are the Drawing's corner coordinates.
David
David Maudlin / Architect www.davidmaudlin.com Digital Architecture AC27 USA • iMac 27" 4.0GHz Quad-core i7 OSX11 | 24 gb ram • MacBook Pro M3 Pro | 36 gb ram OSX14