How to remove parking lens in 76 Dart sport grill

Thanks guys let me know if you figure it out. I bought a really nice grill to replace my cracked one. So I may experiment with my cracked one before I put in the new one. It appears to be sealed in, around some tabs with something in the rear of lens.
Go easy I’ve seen some pretty awesome plastic weld and repair a little pricey but cheaper than nos grill at 700 cdn