What is the right approach for installing a choco package via proxy repository?

So my general approach was the following:

- name: Install virtualbox
      chocolatey.chocolatey.win_chocolatey:
        name: virtualbox
        version: "7.0.18"
        source: http://my-nexus.myorg.org:8081/repository/choco-group/
        state: present

This always failed because of the missing bootstrap script on my nexus instance.

Adding just the following works:

bootstrap_script: https://community.chocolatey.org/install.ps1

But maybe this could also trigger the rate limiter of community.chocolatey.org?

I think having the file in my ansible pool repo is also not a solution, since I need to track the status of the script.

So I think for my scenario having the script at the right location on the proxy sound good.

If I am right how to achieve that behavior?

The examples seems to just point against some simple internal web server.