Parents can choose between attaching the seat with the car’s seatbelt or latch system. When securing a front-facing car seat, the shoulder straps should go through the slots near or above a child’s shoulders. For rear-facing seats, the strap should touch at or below a child’s shoulders. It would also be an excellent idea to review whether the seat’s buckle stays snug and in place or not. If it doesn’t pinch the child and can’t break loose, it’s suitable to use.