For the motherboard, find the large power cable block coming off of the power supply. That 12x2 pin block gets plugged into the matching plug on the motherboard next to the RAM slots. Then the 8 pin (4x2 pin) cable from the power supply (make sure it isnt the pci power) gets plugged into the motherboard up to the right of the rear I/O ports. The PCI plugs from the psu get attached to the graphics card, the fan power cables coming off of the fans get attached to any of the 4 pin fan connectors on the motherboard. Then, the hard drives get the flat, wide power cables from the power supply and those get plugged into the hard drive in the wide, flat plug. Lastly, connect the data to the hard drives by attaching the very similarly shaped, but smaller SATA data cable from the HDD to the motherboard's sata ports. Hope this helps.