Panasonic SC-HTB770 Operating Instructions Manual page 22

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.
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RQT9849
Align the projecting
parts with the holes
on the speaker.
Press into the groove.
Screw (supplied)
≥ Tighten securely.