So I just did a little more looking into this, using the diagrams for a German market car. On those cars the pins used in the US for the rear side marker lights are used for the rear fog lamps.

Looks like I'll be adding a little wiring.

-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.