Score choice for Caltech

I cannot find Calthech requirements for submitting SAT and SAT II scores. Do they require all scores or just all SAT 1 scores? I think at some point they have all scores requirement on their website, but I do not see it anymore. I got 720 for math2. I know it is low, so I will retake it. But do I have to send it to them or just my best score?

http://www.questbridge.org/caltech-app-requirements