I am not sure if the fog lamp location on John's photo is correct. There is a fairly large hole in the bumper near the location of the fog lamp in John's photo, but it is just a drain hole. This one, I am sure, is present in all bumpers.
The distance of the fog lamp from the car center is specified and part of the instructions in technical Manual. The lamp in proper location is shown on the picture there.
There are two holes in a bumper, about 5-6mm diameter, about 10-15mm apart more towards the outer part of the bumper, proper distance from the car center - these are for factory fog lamp bracket, held by 2 screws. They may not be present on all bumpers, I am not sure.
On the picture - location that is most likely correct.