If the power supply supports the required PMbus commands the Intel Active System Console software will display your power (and a bunch of other stuff)
(I don't know if this PS does or not.)

The AUX Power connector (J9D1 (1x7 header) needs to be connect to the SMBUS, but make sure you do not connect the voltage sense line (pin 5) on the Aux power header. Your board is 12v sense and this power supply lloks like a stanard SSI 3.3v.sense
Pins 1,2,4, are used for SMBUS. pins 6,7 are standba power and power on.

ipmitool sensors
will display all the sensor configured in the SDR files (assuming you loaded the SDR's for 'PS1 Power In')

You can also poll the device using IPMITOOL RAW commands. (THESE ARE DANGERIOUS!!! They directly read or write device memory space and if used incorrectly can brick your system. Use at your own risk. No typo's)

A few basic commands to read support PMbus options are:

For the system management software to see the power supply these 2 are required
PMBUS_REV = ipmitool raw 0x06 0x52 0x09 0xb0 0x01 0x98
Should return 11 ( or a string of numbers one of which is 11) This test is to confirm you are communcation with a PMBus power supply of the correct revision.
Capabilities = ipmitool raw 0x06 0x52 0x09 0xb0 0x01 0x19
Should return greater than 80h
To read power in
Quary = ipmitool raw 0x06 0x52 0x0f 0xb0 0x03 0x1a 0x01 0x96
To tell you what data format the next command will be in (Liniear or direct)
READ PIN = ipmitool raw 0x06 0x52 0x0f 0xb0 0x02 0x96
The PMbus specification goes in to the format of the returned values.