Put heat sink on to the top of the CPU die/socket. (Note the step in the heat sink base. The step side goes over the Socket cam box. The other side goes over the lever arm.)
Clip in the heat sink clip to make the three holes fit in the lugs of the socket. (Use a flat bed screwdriver) First attach lever arm side, then the cam box side.
Specs of screw driver: SL - 3/16" X6"