Use kubectl & annotations to assign namespaces to Rancher Projects?

I am using kubectl (Not rancher kubectl) to set up some automated tests for our clusters, using some come of my own custom .yaml as well as some tests that I found in the Kubernetes community.

For organizational purposes, I’d like to keep these automated tests all within a single Rancher Project. From the kubectl perspective, what’s the best way to get projects assigned to a specific Rancher Project? Should I be using annotations such as the following?

kubectl annotate ns/aggregators