Each reminiscence stick has a notch in the contacts lining the bottom edge that strains up with a block in the motherboard’s reminiscence slots. If you hold it simply above the slot and the two line up, it’s going through the right direction. Once the I/O shield is in place, you’ll find a way to set up the motherboard. Double-check to ensure your cables are all threaded by way of to the right place, after which place the motherboard (align it with the I/O shield, first). Using a Phillips #2 screwdriver, mount the primary screw — the center screw — to hold the motherboard in place.