Rear shelf speakers 1970

[richardgoesfast]

I've got 2 different plastic grills on the rear speakers. Installed with different screws (naturally). Were there any plastic grills originally or are there just slots for the sound to come through?

 

[69hemibeep]

There was one rear speaker with slots in the panel, the other side was for a rear window defroster but most people put a second speaker in with the new 8 track tape player they added. Just noticed you have a 70 now I'm not sure if this holds true

 

[richardgoesfast]

Interesting. What you said about defroster gave me an insight possibly. On the rear shelf, I noticed 2 scored oval shapes to far left and far left. Couldn't figure out what they were. They look to be something that one could just punch out with a firm press on them. They look factory, very precisely done, and about maybe 4'" x 2". I'm thinking the rear defroster may have been an option, and if it was, they would punch these out at factory for the vents to blow air on the rear window. I don't know quite what else they could be for.
Following your Hemmings links, nicely done, wow.

 

[richardgoesfast]

Here is a shot of shelf with the punch out on right side. For defrosting air vent?

 

[69hemibeep]

Not sure what that one is for?

 

[richardgoesfast]

If anything comes to you, let me know. From the trunk, there are 2 holes in the steel under the shelf, that seem to correspond to the ovals.