Dell Inspiron 660 / Dell Vostro 270 Pinouts

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Front Panel

+-----+-----+-----+-----+-----+-----+
|     |     |     |     | X   |     |
|  2  |  4  |  6  |  8  | 10  | 12  |
|     |     |     |     | X   |     |
+-----+-----+-----+-----+-----+-----+
|     |     |     |     |     |     |
|  1  |  3  |  5  |  7  |  9  | 11  |
|     |     |     |     |     |     |
+-----+-----+-----+-----+-----+-----+

 1 - Power LED +
 3 - Power LED -

 2 - HDD LED +
 4 - HDD LED -

 5 - Power SW
 6 - Power SW

Short: 5, 8, 11 *
* On Dell Inspiron 600, should confirm for current 660/270