Hello julia,
Welcome to the community! The Neo4j script acts as an individual entity, separate from Federate/Elasticsearch or Investigate. The config.json is the on present in the script folder: Neo4j Script for Windows (Updated the blog with a windows build of the script).
Here, you configure:
"neo4jConnection" : "bolt://localhost", //Bolt connection string to Neo4j
"neo4jUsername" : "neo4j",
"neo4jPassword" : "NEW PASSWORD",
"sirenDataSource": "neo", //The datasource you registered in Management -> Datasources in Investigate
// These are default URLs and would work if you changed nothing and the script is running on the same host as Siren Platform
"sirenHost" : "http://localhost:5606/",
"elasticHost" : "http://localhost:9220/",
"gremlinHost" : "http://localhost:8061/"
This should get you sorted.
Regards,
Varun