Rusty,
you have a radio that is growing in value every day! The last restored one that I saw sell on Ebay went for $760 !!
Originally there were two electrical supply leads coming out of the case, one for the dial lights and the other to run the radio electronics. The lead for the light is not fused and it gets connected to the "dash light" connector on the headlight switch. The other lead should have an inline fuse and it can be connected to the load side of the amp meter.
You are correct that the speaker is inside the radio.
It is very unusual to have the buttons moving properly but not moving the dial. I wonder if the buttons are all set to the same spot on the dial. Try tuning the dial to a different location, pull on a button while exerting some force to the left. The button should come out almost the depth of the plastic. Now push the button in all the way and it should be set to the new dial location.
If you haven't powered it up yet, you may want to look at the suggested procedure in the tech tips.
