import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,61))
r=w0.sketch().segment((-52,-27),(46,-27)).segment((46,2)).arc((57,37),(46,72)).segment((46,100)).segment((-52,100)).segment((-52,72)).arc((-63,37),(-52,2)).close().assemble().finalize().extrude(-123).union(w0.sketch().push([(40.5,-55.5)]).rect(45,89).push([(41,-55)]).circle(12,mode='s').finalize().extrude(-27))