** Switching this jumper to the side of the JP2 label causes the P02 (green connector) to act as an input for ground from the external power source. Otherwise P02 is connected to the internal 12V. | ** Switching this jumper to the side of the JP2 label causes the P02 (green connector) to act as an input for ground from the external power source. Otherwise P02 is connected to the internal 12V. |