I want to send my job’s build artifacts to an API using POST method or curl or any other way.

In particular, this is what I get when I visit my job:

This is a snippet of my Jenkinsfile:

script {
    archiveArtifacts([
        artifacts: "build\doxy_manual.tar.gz, build\doxy_pdf_manuals.tar.gz",
    ])

    curl --location 'MY API' --form 'attachment=@"WHAT TO PUT HERE??"'
}

How can I refer to doxy_manual.tar.gz within my Jenkinsfile in order to send it to my location using curl?