I just looked in my '48 5-window. I can't see anything connected with the headliner that looks like that. You would need more holes in them to be used in the windshield divider.
Do you have a perverse friend who slipped some bogus items in your parts pile?
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
