Accessory for connecting a manual scissor jack to a drill to lift it faster
I would use a clevis pin like the image, with a bit of hex shaft welded into it for the chuck to grip.

Remove the safety clip and withdraw the clevis pin to allow the jack eye-hole to pass into the jaw, then push the pin through and secure with the safety clip. A spacer to reduce the play between the clevis pin diameter and the jack eye-hole diameter will reduce excessive play and wear.

I would make a shaft to go into the drill chuck from some hexagonal shaft - commonly available and likely stronger than grinding flats on some cheap jack handle...