From what I read the Amp Gauge was an accessory up through the 71-123 Series and was not factory installed at all until the 72-125 Series. As such it was either dealer or owner installed and I have seen them in a variety of locations such as: above steering column in dash such as yours (most common), on driveshaft tunnel, or on a bracket (supplied as part of the accessory package) on either side of the control tower. In summary I don't believe that there is a "Correct" factory location for the Amp Gauge until the 72-125 Series tractors. If anyone out there can supply any more information concerning this please let me know.
