The small screws that attach the gas cap to the car are different than used on standard gas caps. They are recessed and short sheet metal screws. I opted to get some from the local supply shop instead of paying the extra amount online.
There is a screw that secures the cap from inside the trunk for protecting from theft of the gas cap. The screw hole is very hard to get to and didn't succeed in putting it in but it may not be necessary unless you are paranoid about someone stealing the gas cap.
|The filler tube goes in from the outside and remember to put the gasket in between the flange and the car.|