1. From Dadar, take local to Bandra Station.
2. Alight at Bandra station, and hire and auto or taxi to Bandra Terminus, which is 10 minutes journey.(theres difference between Bandra and Bandra Ter.)
Other option is to take a local from Dadar to Borivili, and board Swaraj Express at Borivili and avoid taking auto/taxi at Bandra.