If your tank is on the left side of your car, the handle will be on the left.
If your tank is on the right side of your car, the handle will be on the right.
That's inaccurate. Last time this was posted I provided an example that proved it wrong and I have a new one. My car has the pump handle on the right side; however, the arrow is located and points to the left. The arrow is the indicator to go by.