Custom headers for proxy maven repository to Gitlab package repo?

Sonatype Nexus Repository
1

I’m trying to add a proxy Maven repository for a Gitlab package repository.
Gitlab repositories require authentication via a custom header.

e.g.

Private-Token: abcdefghijk

I can’t find a way to configure this. Any ideas?

3

just add the username and the token to the http-authentication username and passwort field… at least here it works