Remove the speaker unit and solder a new unit in place.

When disconnecting leads, always disconnect as near as possible to the component being replaced, to allow room for reattachment.

Locate the leads that connect to the back of the speaker unit.

Disconnect the leads from the back of the speaker unit.

Remove the speaker unit, and replace by soldering the leads back into their correct locations.

Refer to the iFixit soldering guide for assistance with soldering.