SBC-558P Installation Guide 23ATX power connector (CN20)ATX power connector (CN20)Pin Signal Pin Signal1 VCC3 11 VCC32 VCC3 12 -12V3 GND 13 GND4 VCC 14 PS_ON5 GND 15 GND6 VCC 16 GND7 GND 17 GND8 NC 18 -5V9 5VBS 19 VCC10 +12V 20 VCCAT to ATX Connector (CN19)Connector (CN19)Pin Signal1 NC2 GND3 NC4 GND5 PS_ON6 5VSB