This one was a bit confusing for me at first.
Connectors section of Harness is strictly 3rd party integrations. This would be things like Docker Hub, Artifactory, DataDog, Prometheus, Solunk, ELK, Git Repos, Jira, and ServiceNow. Once those are setup, you can leverage them in either in Services, Environments, Workflows, Triggers, or Infrastructure Definitions.
For any integrations that are 1st party (AWS: S3, CloudWatch, ECS, etc. GCP: GCR, StackDriver, etc. Azure: ACR, AKV, etc.) those are added via the
Cloud Providers section and granted via IAM roles and policies (check out this doc for those policies). When that is configured correctly, you’ll have access to those pieces in Services, Environments, Workflows, Triggers, or Infrastructure Definitions.
Hopefully that helps!