If it's got any saved setting's in the device's memory it will be a 12v permanent connection to the battery. Which other signal outputs does it have, do you know?
If your pulling it out
and want to retain the settings already on there, jus' don't disconnect the permanent 12v to battery and it's earth.
Is it possibe you can scan the instructions/diagram then you can maybe translate with an online translator. That's what i had to do with the Sard Pro el gauges on mine as i did'nt have a clue what wire was what, showed them to my tech friend and he said it's pretty self explanatory, but i did not want to risk blowing them up.
If you cannot find anything you can maybe try contacting Sard USA.