What exactly are they fixing? I am by no means dumbing anything down or disrespecting you but, it is pointing to a fuel pump. A fuel pump is at a gas station. There is no correlation between a fuel pump and a gas gauge. The indicator in the display is pointing at the fuel pump at a gas station. I have never used a display to look for what side my fuel tank is filled from, only the gas gauge. Also, if the gas gauge does not have an arrow, the there will be an icon on either the left or right side of the gauge telling you what side it is filled from.
Sorry if I'm brash, I've just never had this issue before and it seems like this is an inconvenience for some when, truthfully, the answer where the gas is to be filled is right where it should be: the gas gauge.