I bought a new pair of &quot;oliver&quot; guages for my Oliver 1800. They look like the originals from the face, but are different at the rear. Instead of 2 terminals I have three. 

They are marked &quot;B&quot;, &quot;T&quot;, and with the &quot;GND&quot; symbol. Would all agree that the &quot;B&quot; would be battery and the &quot;T&quot; to either the temp sender or fuel tank float?