Where in the Constituton does it give the Supreme Court jurisdiction to tell the electoral college that they can't elect some individual as president?
They have no jurisdiction at all in regard to the eligibility of any single person that the electoral college elects. Congress is charged with determining whether or not the electoral college results are certified. If Congress determines that the person who was duly elected is not "eligible" then they can say so at that time. Once they certify the election, the only way to remove the President is by impeachment.
I guess the Constitution is only important if it keeps a solid conservative like Cruz out of office, eh?
A clear interpretation of he Framers’ intent, which IS the job of SCOTUS, would preclude anyone not eligible from getting on the ballot to begin with. It would never get as far as the electoral college or to the Congress.