Hmmm, according to the 2020 supp regs
"Points Individual points for each daily race will be based on a descending order from the first place of 9,7,5,3,2,1, Classes with less than a full 6-car grid will receive a reduced point plan: ie. 5-car grid would be pointed 7,5,3,2,1…a 3-car grid would be pointed 3,2,1. One point shall be awarded to competitors for completing 50% or more of the race."