An older gentleman brought me a VV-4-3 motor and asked me to find a crank for it. I tried the one from my VV-4-3, but it does not even fit into the hole. On closer inspection I found that there are no threads inside the crank hole

There is also some do-hickey attached to the ratcheting device that I have never seen before. Please see attached pictures. Has anyone seen this arrangement before and what kind of crank do I need for it?
Thanks
Andreas