Right at the top of the wiki page for the Nexus Artifact Uploader it states:

This plugin goal is to upload artifacts generated from non-maven projects to Nexus

But a question was asked:

How do I set a GroupId for a raw repository?

I can not find a Nexus 3 setting to add a GroupId to a raw repository, and this plugin requires a GroupId to be specified.

Which was answered with:

Plugin supports only Maven type repositories in Nexus.

So I am just trying to square that answer with the statement from the top of the wiki:

This plugin goal is to upload artifacts generated from non-maven projects to Nexus

before I expend time to dive in and try to use it.