Pardon the confusion. As a mechanic, I was taught to refer to right and left as viewed from the operators seat facing the direction of travel.
To be more specific, the tube screws into the casting that the top radiator hose connects to, this is also the bracket that supports the fan.
TSC has replcement gauges for around $30. I haven't checked to see if the tube is long enought for a "C".
Best,
Mike