Illuminate LED When Engine Is Running

Hello everyone!

I am trying to make a dash for Rigs of Rods and it works close enough to Beam.ng that I can get away fine with most things, however I am trying to have the Arduino set a pin to HIGH when the engine is running in game. Anyone know of any way to do this? I was going through the arduino options on the SimHub and all the LED options are for fancy LED's, nothing for a standard 2pin 3.5mm LED. 

Any help is very much appreciated!

Thank you!