Source: https://tequipment-finder.porsche.com/prod/pag/tequipment/Live/TequipmentInfoLive.nsf/0/764C2E996141B712C1257F78004BC7BF/$file/955.044.802.88%20%E2%80%93PORSCHE%20Junior%20Seat%20ISOFIX%20Manual%E2%80%93%20Central%20Europe.pdf