@dg_dex Thanks again ! I've seen a man who do that, I tried but the wire always get out. I think I can't solder on the copper track (maybe because of my poor tools).
How are you soldering? I suggest using non acidic flux and then hearlting the track up with your iron, then quickly apply a small amount of solder to the track. Scrape the green texture from the board before you attempt to solder to the track. Be very careful. Do not apply a lot of heat to those tracks or it could end up being game over.
Last edited by dg_dex,