The front panel header is typically located on the of the board. If your board lacks clear labels, use this common configuration for Acer/ECS boards of this era: HDD LED: Pins 1 (+) and 2 (-). Power LED: Pins 2 (+) and 4 (-). Power Switch: Pins 6 and 8 (polarity does not matter). Reset Switch: Pins 5 and 7 (polarity does not matter).
While the official may have disappeared from the internet, the technical specifications, jumper settings, and troubleshooting steps outlined above cover 99% of what you need to keep this vintage motherboard operational. acer mcp73t-ad motherboard manual