camera - Connecting old webcam via USB - Electrical Connecting old webcam via USB. The webcam and the LCD were connected to the motherboard by LVDS. Supposedly this webcam has a USB interface according to a manual - see bottom of page 17. I would like to know what I would need to do to connect this board (picture of connector pins) to a USB pinout, wiring and how it works! - Electroschematics USB A, B 2.0 and 3.0 Cable Pinout. The USB cable provides four pathways- two power conductors and two twisted signal conductors. The USB device that uses full speed bandwidth devices must have a twisted pair D+ and D- conductors. The data is transferred through the D+ and D- connectors while Vbus and Gnd connectors provide power to the USB device.