To delete an existing connector: 

1. Click the "Configurations" option from the left menu.
2. Click the "Connectors" option.
3. Click  adjacent to the connector (to delete) from the main grid. 
   
   
   
   
4. The system will prompt to confirm the deletion. Click the "Yes" option.
5. Click the "Publish Changes" button from the top right corner, to make these configurations effective on the front-end (SigningHub Desktop Web).

​As long as a connector is being used in the configuration of any Profile/ Global Settings/ Service Plan, it can not be deleted.