There are four more optional fan connectors on the motherboard that can be used for adding more system fans.
Auxiliary fan connector
COM1
Auxiliary fan connector
Auxiliary fan connector
fan
connector
Fan Connector
32
GND +12V
SENSE
Fan Connector
32
GND +12V
SENSE
Fan Connector
32
GND +12V
SENSE
The motherboard kit provides an additional serial COM header for your machine. Connect one side of a switching cable to the header and then attach the serial COM device to the other side of the cable.