WTA, how to fix this heat sink correctly ?

I did was :

1) Apply thermal paste
2) Place the X-Thingy on the heatsink. ( Donno need to screw anything ? )
3) Put the Bracket behind the MB.
4) Fix the Nut and bolt on the MB
5) Adjust the X-Thingy untill can fit into the nuts.
6) Screw the X-Thingy untill thing into the nuts.