... wind the first anticlockwise and the second clockwise to lock them together. Use the top nut to wind in the stud. If the assembly will not lock sufficiently to wind in the stud, get the largest pair of vyce grips you can use in the situation, and adjust them so they clamp ferociously on the pair of nuts - and use that to wind in the stud. If that doesn't work you will have to use a ...