hmm.. je ne suis pas sûr que je comprends que tu as écrit (like I said, my French is limited...)
It looks like the ADNS-2030 is the low power version of ADNS-2051. It uses the same commands/addresses.
However, it's maximum supply voltage is 3.6V... So you'll probably break it if you try to connect it to your Arduino (because it's powered with 5V).
If you post a detailed scan or picture of the S2083 circuit (both top and bottom sides), I can have look at it for you, peut-être, je peux éloigner un peut de l'incertitude... (forgive if if I'm talking nonsense... I'm trying ;))