Passbolt on EKS with external RDS (MariaDB)

Hello,

We are trying to install passbolt on EKS with external RDS (MariaDB)
Following this : GitHub - passbolt/charts-passbolt: Helm charts to run Passbolt on Kubernetes. No strings attached charts to run the open source password manager for teams!

How / where we can specify the external DB host details (URL / username and pass) ?