Rasax Helm Charts - How to edit the statefulsets configurations

I have installed Rasa-X helm chart and it is installing all the deployments. But I want to edit the statefulsets configuration as our org is not allowing bitnami registry images for postgres, rabbitmq & redis.

I could see the dependencies in Charts.yaml file. How to change the image locations so that the images will be from my custom registry not from the belwo directory. I have given an example for postgres…

image: registry: docker.io repository: bitnami/postgresql tag: 11.14.0-debian-10-r28

Please suggest next steps on the same. Thank you in advance.