TMC AI5TT User Manual page 40

Chapter 5 Installation
Reset Switch: Pins 9 and 19
The reset switch allows the user to reset the system without
turning the main power switch Off and then On.
Orientation is not required when making a connection to
this header.
Hard Disk Drive LED Connector: Pins 10 and 20
This connector connects to the HDD activity LED on the
control panel. This LED flashes when the HDD is being
accessed.
36 AI5TT Pentium Baby AT Motherboard User's Manual
J20 Pin # Signal Name
10
20
Ground
5V