Helm/Tiller not installed to the cluster before using helm charts

I just setup a custom test cluster on VMs and enabled the helm catalog.

However, helm catalog apps are not launched properly. Looking at the cluster pods via kubectl, i do not see tiller running in the cluster -> so i have to manually install helm/tiller before i can launch helm charts.

Installing helm via the kubectl is not possible so i have to manually install helm outside rancher 2.0. How are the helm charts deployed then? Makes no sense to me.

Appreciate any help