yes in Eu its mandatory to have rear fog lights or at least one and they are in the rear bottom relfectors in the US models.
John, yes you would need the wiring diagrams from an eu model.
For forscan check the mazda3revolution forum asbuilt and ask there. There is excel file with all the known parameters. Most are from Europe.
Somebody therr may also have the diagrams.
Interesting, I remember those lights from trips to Europe or countries with EU standards, such as Hong Kong, before it went back to the Chinese.
The other interesting thing I remember, which I don't know if it is required still, was what I call half parking lights. There was a switch that turned on dim, left or right side parking lights, depending on RH or LH drive car (I saw this on UK/Hong Kong cars also) so that you would not clip a car pulled over to the side of the narrow roads.