LimeSDR Mini Fan

I had a look at the LimeSDR Mini documentation for adding a fan.
One thing I’m not sure of is the polarity.

I know I need to solder to port J10, I’m wondering when looking at the port, when look at the LimeSDR Mini from the top view and when it is below the silver heat sink.

Is this port 3.3V or 5V ?
Which pin is the V++ and which is the GND ? J10 on middle of last page. pin1=GND pin2=5.0V

perfect thank you very much!

Kindly help me to locate the J10 for FAN.


J10 is beside the RF shielding on the side of the LimeSDR Mini
VCC is labelled on the right pin if the usb connector is point left