import cadquery as cq
w0=cq.Workplane('YZ',origin=(-17,0,0))
w1=cq.Workplane('YZ',origin=(-13,0,0))
r=w0.sketch().push([(-19,7.5)]).rect(50,39).push([(29,22)]).circle(15).finalize().extrude(-33).union(w1.workplane(offset=63/2).moveTo(-30.5,-19).box(5,36,63))