import cadquery as cq
w0=cq.Workplane('YZ',origin=(-23,0,0))
r=w0.workplane(offset=13/2).moveTo(10.5,-14).box(79,22,13).union(w0.sketch().push([(-28,3)]).circle(22).reset().face(w0.sketch().segment((-42,9),(-36,-4)).segment((-36,-11)).segment((-33,-11)).segment((-31,-11)).segment((-19,-11)).segment((-19,-5)).segment((-13,-3)).segment((-19,10)).segment((-19,17)).segment((-22,17)).segment((-24,17)).segment((-36,17)).segment((-36,11)).close().assemble(),mode='s').finalize().extrude(46))