By clicking on the Directions à Add to Origin option, address of that record will be added as starting point in Routes. 
From Routes tab you will get address of your customer’s location.
On the map, the ‘Starting Point’ will be assigned as A with the address of that record displayed. 
By clicking on the Add to Destination option of the other records, the address of that record will be added as destination point of route under Directions tab. 
You can select the Origin and the Destination between the plotted records from the Directions option and manage your route based on that direction. 
Click on the GO button to check the routes between selected Origin and Destination on the Map.