Thanks all. I think I read somewhere that there's a spot designed to hold the gas cap (a work of art all by itself) in place, instead of it resting on the side of the car.
But, I cannot recall - anyone have insight into this minor - but important to me - question? TIA!

 

The gas tank top on my 2005 DB9 has a hole on the inside of the lid. The gas cap has a round "peg" that plugs into the hole. Holds the gas cap securely.

 

Thanks Bob. We're in Ocean Isle Beach until next week, so I will take a look upon our return to Virginia. Appreciate it.

 

My 08 vantage has the hole as well but I never use it…it throws out the fit of the flap…was constantly adjusting it to open on the button..