Volvo C30 2007 Service And Repair Manual page 351

ACCESSORIES AND BODY, CAB Interior - Installation Instructions, Accessories
Fold the backrest forward on the front passenger side.
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Fig. 56: ISOFIX Attachment And Screws
Courtesy of VOLVO CARS CORPORATION
Install the ISOFIX attachment to the SIPS tube with the four screws from the kit. Tighten the screws to 10

Nm (7.5 lbf. ft.)
Reset the backrest.
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ISOFIX-GUIDE (2007-2012)
ISOFIX-GUIDE
INSTALLING/REMOVING THE ISOFIX-GUIDE
Illustration applies to the passenger seat and car models
2012 Volvo C30 T-5