Wires

Video sign

This ones transmit the Graphics or Video sign from the GPU or Pc to the screen.

SATA

This one is to transfer information from the Motherboard to the component connected (Disk compartment, HDD, etc...) 

Supply

This one supplies the power supply, screen and some peripherals; from the AC.

This ones supply some components as the GPU, HDD, Disk Compartment, etc.. And are connected to the Power Supply