The front side marker holes will be welded shut just like the rear except that a small, round hole will be added to mount the European round side marker lamps.
Here's a shot after laying down some tack welds. You can see the carbon black around the welds. This needs to be cleaned off with a wire wheel before attempting to add more weld.
Bill / 1977 Alfa Romeo 4C2000 / 2012 BMW S1000RR / 1975 BMW R90/6