If you have some old 1/2 inch drive sockets that your not to worried about find one the right size and hammer it on the locking nut. use an old extension bar as well so you don't damage the square drive. done this loads of times on scrap cars.
dave
ps Not that that your car is scrap but with a bit of care it will be fine with no damage to the car only the socket and wheel nut witch is no good anyway.