As the French Army ordered the monster batch of 5,000 machines - all sidecar equipped, IMC marked both tanks with markings in FRENCH.
The left (main fuel tank) is marked by a decal with "CARBURANT" (Fuel), while the right tank (containing oil and fuel in seperate compartments) is marked by a decal with "CARBURANT" (Fuel) and another one indicating "HUILE" (Oil).
A picture of this can even be seen in the original Manual for the US Army (IMC# M601)... The just used photos of the French CAV machines instead of the US Army version....