On their original post it said you had to direct message them with your choice
Seems they've disregarded that idea tho because the ST was the first posted in the comments of that new post with 16 likes, wasn't a lot of cars in it but the rest only got 2 or 3 likes each, STormtrooper was a creative idea to be fair to him so well done to the guy voting idea is probably a good idea just poorly executed, probably should have been done on the day and a lot less reliant on facebook comments on an event page.