Mike,Going to detail it out, so those needing this info in the future also, can use it.
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c00647121&dlc=enScroll towards the bottom of the page for the motherboard illustration, and photo.The front of a desktop computer is the Front Panel.The area of contact pins on the motherboard, that the main wires go to from the Front panel, is the Front panel header.In the illustration, and as the motherboard sits in your computer case, the Front Panel is at the Bottom/Right corner.In the Illustration it is F_PANEL1.In the photo it is the black rectangular block, with 9 contact pins.Two rows of pins.4 on the Top row, 5 on the Bottom row.The pins on the Top row are numbered EVEN. The pins on the Bottom row are numbered ODD.Starting on the LEFT side on the Top row, going across to the Right;Pins 2, 4, 6, and 8.Starting on the LEFT side on the Bottom row, going across to the Right:Pins 1, 3, 5, 7, and 9.A) Pins 1 and 3 are for the HarDDrive activity LED.Pin 1 is for the Positive ( + ) wire.If the HDD LED is dim when the harddrive is active, switch the wires around.B) Pins 5 and 7 are for a Reset switch, IF a RST SW is used.C) Pin 9 is N/C. Not Connected. Pin is reserved for factory use.D) Pins 2 and 4 are for the Power On LED.Pin 2 is for the Positive ( + ) wire. If the PWR LED is dim when the computer is on, switch the wires around.E) Pins 6 and 8 are for the Power On switch.F) There is NO Pin 10. Just a blank spot.Regards,joecoolvette