Back door panel removal ('00 Vitz) HELP !

[Demon]

Hello !!

Ok, I admit, I'm not keen in those things but I'm finding this one very tricky.
I cannot remove the rear door panels of my 2000 Yaris.
It's a 5 doors, and of course, it has rear window handles, wich are linked to the body whit something like a clip...or sort of.
So, I cannot find this clip, and the panel is stuck in his position because of this.
In the Italy Yaris Club they say that is easy to find this clip or this lttle piece of metal behind the panel, but I'm doing the same thing for six months...there is something wrong.

There's nothing on the DIY manual v3 abouta the old Vitz (2000-2005)

Can someone help me ?

Here's My car:



And this is for give you an idea..






Thank You !