INARRITU

Hi, can you tell me how can I keep open the trap door of my Mustang FB 1970, I have the handel attached to the door and a litlle bracket that should be attached in 2 holes in the trunknin the right side of the trap door. I think one piece must be missing but I do not know.
Does any body have a picture?
Thank you very much
best wishes
Florencio