Acer Ipisb-vr Rev 1.01 Front Panel [extra | Quality]
The most critical connection; polarity (positive/negative) doesn't matter for switches. Reset Switch Allows for a hard reboot; orientation does not matter. Polarity matters. Pin 1 is typically Positive (+), and Pin 3 is Negative (-). Polarity matters. Pin 2 is typically Positive (+), and Pin 4 is Negative (-).
Hard Drive activity light. Pin 1 is Positive (+), Pin 3 is Negative (-). acer ipisb-vr rev 1.01 front panel