Where is the 2004 Peugeot 206 petrol impact sensor?

Friends Where is the gasoline impact sensor on the 2004 peugeot 206 x-line? They are written on the back of the battery, but I looked there is nothing like that.

Sir, my 206 was just behind the 1,4 xr battery. It already has a plastic cap slightly larger than the very prominent pet bottle cap in orange or red color.