66 Dart Convertible Rear Seat/Boot Question

I have this

92F84DC7-46E8-407C-87D3-6CE5B4AA88AA.jpeg

58E431B2-4B03-40B2-B22E-8F7B06CBDE7E.jpeg

36FB35F4-CD7A-40D6-B6BC-4C9E8B8062A3.jpeg

D557EBE9-6C98-4DC3-9C31-4B3554EFE274.jpeg

397BA818-62BC-4DAC-B27E-FBC5F8823AA7.jpeg