The Golden key

Officer Barnard picked up the piece of paper, and followed the directions to the safe embedded into the concrete wall of the lab. He tapped in the code on the keypad, and twisted the large handle. With a satisfying clunk, the handle snapped down and he had to put one hand against the wall in order to pull the door open.

Inside sat a small box, lonely, on the bottom of safe. Of the three cables, a golden one was left unplugged. He glanced at scrawled handwriting of a dying man, and plugged the golden cable into the network router...