In the webrec.properties file you could specify default values for any parameter which will be used inside your connector. All these paramters later could be overwritten with values provided from JSON object during webRec.loadFromStorage() request.

Sample:

ConnectorName={"class": "de.cib.webrec.backend.service.document.MockStorageConnector",
"param1": "Connector2param1", "param2": "Connector2param2"}