Currently users can't configure looker projects within activation sources via fivetran / census API. The REST API docs only mention actions list and refresh projects: https://fivetran.com/docs/activations/rest-api/api-reference/workspace-apis/sources/projects/refresh-project-status

Ideally there should be an API to provision looker projects as well so users can avoid having to copy credentials somewhere else and paste them in fivetran UI. It could be an automated step.

best