The contest is voted on by those that entered, there really isn't any points to be had as in your kit is judged out of 30 points or something.
What we have done in the past, and what I believe we will be doing for the 2013 edition is when you vote, you pick your 1st, 2nd, and 3rd place kits in each category, 1st gets 3pts, 2nd 2pts and 3rd 1pt. Once everyone votes, points are added up and the one with the most points in the category wins 1st, 2nd amount of points wins 2nd, etc, etc.
What we as entrants have to go by, are the 5-6 pictures that you the builder submits for the rest of us to see. If you do wiring on you race car, then show us a picture with the hood off, otherwise we wouldn't know if you did it or not. Everything is subjective as far as voting, we can only go by the pictures you submit of your finished entry, so you could go to town and super detail everything on the kit, but if you don't show us what you did...how would we ever know?