import cadquery as cq
w0=cq.Workplane('YZ',origin=(-46,0,0))
r=w0.sketch().push([(-74.5,23)]).rect(51,112).reset().face(w0.sketch().segment((-45,-79),(81,-79)).segment((81,-54)).segment((100,-54)).segment((100,29)).segment((81,29)).segment((81,45)).segment((20,45)).arc((15,47),(10,45)).segment((-45,45)).close().assemble()).finalize().extrude(93)