Simconnect value to read KEY_TUG_HEADING

I have the event to set the value TransmitEvent(EventEnum.KEY_TUG_HEADING, iValue);

I can’t find the read value

what is the simconnect variable to read TUG_HEADING?
thanks

Maybe PUSHBACK ANGLE?
https://docs.flightsimulator.com/html/Programming_Tools/SimVars/Services_Variables.htm#PUSHBACK_ANGLE

thanks for the reply … that angle is the angle between the Tug and the Airplane, what I’m after is the tug has it’s own Units of measure for direction …