Tiebreaker in online dynasty?

We are currently in an online dynasty and here is the scenario:

Texas: 10-2 (8-2 SEC) SMU: 10-2 (8-2 SEC) Arkansas: 10-2 (8-2 SEC)

Texas beat SMU head to head but Arkansas has not played either team.

Does anyone know what the tiebreaker will be for the SEC championship game?

Points for? Score differential? Common opponents? CFP Ranking?