Migrating from self-hosted GitHub Enterprise to self-hosted GitLab

I’ve got a self-hosted instance of GitHub Enterprise with some repositories that I want to migrate over to a self-hosted instance of GitLab. Most of the guidance and documentation are surrounding migration from GitHub.com to GitLab.

I can’t seem to customize the Github import option to suit a self-hosted scenario. Is there anyone who might be able to help with this?

The end goal is to be able to do it using a Personal Access Token as username/password login has been turned off.

Thanks in advance!!