How do I repair a broken soldered cable wire?

I was replacing the charging port for my iPhone 6s plus. In the process of taking out the loud speaker, a small soldered cable wire that runs across the top of the loud speaker and down to the left side of the speaker broke off from the brackets underside. The metal bracket is held down by three screws toward the bottom right of the phone’s interior. I wanted to know if I could just buy a loud speaker and have these cable wires attached to the loud speaker? If not, how would I be able to get that wire? I can’t seem to find this part for purchase.