Solder the black cable of the left speaker to the nodule marked L+ on the motherboard.

Do not allow solder from one nodule to touch another nodule. This will cause the speakers to malfunction.

Solder the black cable of the Right speaker to the nodule marked R+ on the motherboard.

Solder the red cable of the left speaker to the nodule marked L- on the motherboard.

Solder the red cable of the right speaker to the nodule marked R- on the motherboard.