Docker group content selector

Hello guys! I am trying to configure docker group, add several docker repositories and one proxy for docker hub.
I created nexus connector http port 10001 for docker group and it’s working properly.
I logged in
docker login localhost:10001

I changed docker’s agent settings for registries in /etc/container/registries.conf to search repos
registries = ['localhost:10001']

I can search in all repositories using the command
docker search my-test
But I have several repositories and want to limit using content selector
when I am adding
path =^ "/v2/docker-hosted"

I have 401 error…
I tried to add different content selectors from this document , but without any result.
Please, advise what I am doing wrong? How I can limit using repositories in docker group.
I appreciate any advise