I guess many of us are lured to upgrade storage by converting the optical drive to ssd . I am uncertain that this can be fixed by soldering but I hope it can. However I will consider this as minor problem so that I will not be tempted to solder it or bring it to repair shop.
The best solution I can give is to buy a good speaker or just use a headphone rather than solder it and completely destroy the logic board. That will give us even more stress