Try this:
Forum Fiat 500 : siega avant ne coulisse plus
www-nouvelle--fiat500-fr.translate.goog
A fragment of a sentence part way down (even when translated) and the few remaining active photos should tell you all you need to know:
Then we get down to business. First of all, you have to remove the screw that holds the handle to the seat, it is located in this location. That was the easiest part. Then you will have to remove the handle from the seat,
and there .... we can say that the clips really do their job. As you can see in the photo below, there are 2 clips on the black square part that goes there the seat and which made into the metal part. The only method I found is the "nothing-left-to-lose" method. The old handle being named anyway, I went there with my big muscular arms. And so once out, we get this. There you can say to yourself that the hardest part is done. All that remains here is to unclip the handle sheath (arrow), and you get this: Then just put your new handle back on, taking care to put the end of the cable in the right part of the handle (photo 1), reclip and screw the handle back on and that's it. :cheers: