Original Radio Speaker Bracket Mount

[kna4977]

I've searched and found a few related threads on here and other sites.

I've looked through the service manual, assembly manual and have done several google searches for images, but can't seem to find what I'm looking for.

I have a 1972 with factory air and AM radio. I have an original AM radio, the bracket on the back that attaches to the under dash bracket.

The truck is missing the speaker. I have a new speaker, but I'm unsure what if anything else I need that I don't have already to install it. Is there an additional bracket necessary for install?

Anyone have a schematic they can share of the setup?