How to annotate Istiod/istio-pilot services in Istio 1.6.3 via Operator

We are trying to add some custom Annotations to the:

istiod
istio-pilot

Kubernetes “service” (namespace: istio-system) using the Istio Operator

Cluster: EKS 1.15
Istio: 1.6.3
Deployed and configured via Operator CRD