Figure 26. Step 4 - Backplate Pins - Intel Core 2 Duo Processor User Manual

CPU Thermal Solution (Heatsink) Installation
4. Place the backplate on the underside of the development board so that the pins
protrude through the holes in the development board around the processor. (See
the figure below.)

Figure 26. Step 4 - Backplate Pins

76 Development Kit User's Manual