Front fog lights were not commonly installed on US version cars. Not sure where they would go on a car with Bumperettes.
Assuming your car is a Euro model, here's a photo show approximate placement.
I suspect placement may have varied a bit as some of these lights were added by dealers or the owners themselves.
I seem to recall that if a bumper has pre-drilled holes for the bumper guards (capped if not used) that these holes can be used.
The car in the photo is away for the Winter so I cannot get an exact measurement.
Richard M, NYC