Kubica won the race in his fifth attempt, his first three in the second tier LMP2 category, to become Poland's first overall winner since Le Mans was first staged in 1923.
The Serb set up the breakaway PTPA on the eve of the US Open in September and resigned as head of the player council but last month he confirmed that he had been nominated by his fellow professionals for the current elections which he accepted.
Indian racer Arjun Maini made a strong start to his highly-anticipated debut in the European LeMans Series, recording the second fastest laptime in the qualifying session of the race.