import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-9,0))
w1=cq.Workplane('YZ',origin=(-9,0,0))
r=w0.workplane(offset=-6/2).moveTo(30.5,44).box(7,12,6).union(w1.workplane(offset=-41/2).moveTo(11.5,-21).box(7,26,41))