How to duplicate a runner configuration?

I have a working runner registered on ~10 repositories.
Executor is Windows power shell.

Now I’d like to configure multiple build VMs with the same configuration.
I was assuming I could reuse my working/preconfigured config.toml file to clone the config on other VMs but I am not sure it is possible. When calling “gitlab-runner register” it keeps on asking for url, etc…

Can you advise what’s the best way to duplicate a runner configuration ?