There are several points on the motherboard where power can be draw, for devices requiring 3.3v or 5v. Ground is universal and allows for short wire runs. A diagram over the points can be found on the research page. The signal wires thickness is 30 AWG and 24 AWG for the power and ground wires. The wire type is called wire wrap and used for prototyping and repair work. Mine is Tefzel insulated and