The only sdk to dwg conversion we know about is export of AutoSketch drawings (.sdk) to AutoCAD drawing format (.dwg) something that might not be that simple nowadays since the software has been discontinued in 2016. Some versions of AutoCAD can still import .sdk files, but otherwise you have to obtain accesses to the original software somehow. No converter that could be used for this is otherwise known to use at this time.
Updated: October 25, 2023