import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,34,0))
r=w0.sketch().segment((-100,-29),(-76,-29)).arc((-6,-81),(65,-29)).segment((89,-29)).segment((89,14)).segment((65,14)).arc((-6,66),(-76,14)).segment((-100,14)).close().assemble().finalize().extrude(-68).union(w0.workplane(offset=-45/2).moveTo(98.5,63).box(3,36,45))