The extra tab on each of the terminals is for a bleeder resistor to discharge the start cap as the motor runs. A centrifugal start switch or a relay disconnects the start cap while the motor is running.

On capacitor start-capacitor run motors as the motor stops the start and run capacitors are once again connected in parallel and without the bleeder resistor the potentially still charged start cap suddenly discharges into the run cap and that current spike can literally weld the switch or relay contacts together. This doesn't apply to a capacitor start induction run motor with no run cap.