Volvo 2004 V70R Operation And Care Manual page 87

Fit the bulb holder in place and twist it clockwise.
Refit the sound insulation and put the access panel back in place.
Replacement of rear turn signal and brake light bulbs
Switch off all lights and turn the ignition switch to position 0.
Using a screwdriver, carefully pry off the speaker grille.
Pull out the red tab in the speaker.
Then press on the black pin above the extracted red tab and twist out the speaker.
Twist the bulb holder counterclockwise, and withdraw it.
Fit a new bulb.
Fit the bulb holder in place and twist it clockwise.
Refit the speaker and press in the red tab.
Press the speaker grille back into position.
pg. 125 Replacing bulbs