MSI MS-99A1 - Connector; Fan Power Connector: CPUFAN1, SYSFAN1; Smbus;I2 C Bus Connector: JSMB1, JI2 C2; CAN Bus Connector: JCANBUS1

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Hardware Setup MS-99A1
Connector
Fan Power Connector: CPUFAN1, SYSFAN1
The fan power connectors support system cooling fan with +12V. When
connecting the wire to the connectors, always note that the red wire is the positive
and should be connected to the +12V; the black wire is Ground and should be
connected to GND.
SMBus/I2C Bus Connector: JSMB1, JI2C2 (This function de-
pends on CPU module board)
This connector, known as I2C, is for users to connect System Management Bus
(SMBus) interface.
CAN Bus Connector: JCANBUS1 (This function depends on
CPU module board)
Controller Area Network (CAN or CAN-bus) is a message based protocol
designed specically for automotive applications but now is also used in other
areas such as industrial automation and medical equipment. The bus connector
for the CAN Bus is used to connect a CAN Bus participant to the CAN Bus line.