A child seat upper harness attachment system includes a vehicle seat having a seat back supported on a seat back support structure and a seat base member. A first shoulder strap extends through at least one first aperture in the seat back and is releasably connected to a multiple attachment point buckle for restraint of a child occupant of the vehicle seat. A second shoulder strap extends through at least one second aperture in the seat back and is releasably connected to the multiple attachment point buckle for restraint of the child occupant. A crotch-strap extends through the seat base member and is releasably connected to the multiple attachment point buckle for restraint of the child occupant. A belt connecting member connects one of the first shoulder strap or the second shoulder strap to the seat back support structure.