Panasonic SC-HTB770 Owner's Manual page 23

Assemble the front speakers:
Attach the speaker base.
≥ The two front speakers are interchangeable.
≥ Keep the screws out of reach of children to prevent swallowing.
Red connector: The speaker attached to the red connector cable is to be placed on the right side.
White connector: The speaker attached to the white connector cable is to be placed on the left side.
Align the projecting
parts with the holes
on the speaker.
Press into the groove.
Screw (supplied)
≥ Tighten securely.
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