Conn. Agencies Regs. § 12-574-A20
(k) Determination of winner, refund. If there is a failure to select, in order, the first four horses, payoff shall be made on superfecta tickets selecting the first three horses, in order; failure to select the first three horses, payoff to superfecta tickets selecting the first two horses, in order, failure to select the first two horses, payoff to superfecta tickets selecting the winner to win, failure to select the winner to win shall cause a refund of all superfecta tickets.
(l) Scratched or excused horse. Should any horse entered in a superfecta race be scratched or excused by the stewards after wagering has commenced, or should any horse be prevented from racing because of the failure of the starting gate to open, all tickets including such horse shall be deducted from the superfecta pool and money refunded to the purchasers of tickets on the horse so excused or prevented from racing.