What holds up the fuse box?

We are about to finish my son's '74 Dart Sport. As soon as all the under dash items get put back in place, we'll install the dash pad and windshield. Then carpet and seats. After that, I don't want to be crawling around under the dash again.

After three years, I can't remember what held up the fuse box and where it actually goes. Right now it is just dangling down below the dash from its wiring harness.

Jerry