It's like a magnet. I do apologise, I don't think calling it a magnet would make sense
It's hard to tell what it is since I dunno what you call it but i'll try to explain what the little thing is
When it is open the stick is outward, when you push the stick that is inside the rubber material it goes in and along with it I think it's supposed to close the fuel panel shut??
Apparently when pushed inwards it will NOT close the panel, there is no response either way.
A better word to describe it just came to my mind, SPRING
It's like a spring, a better description is like the spring that is inside a pen.
So like the pen in the above image, if you push it in it'll go in and stay there (provided spring is functioning well). I don't need to say the rest do I?
So the 'thing' or spring or whatever it is called functions like that. If I push it in it'll make a noise like a pen does, if I push in again it'll come out.
I don't know how this thing could possibly hold a metalic fuel panel??? Isn't there like a chance of some sort of spring that is perhaps missing?