a seat belt with two latches on either end. these latches are going to attach to the anchors. pull the seat belt material through the holes in the back of the seat where it supposed to thread through. here, you will need to reference the car seat manual to see where it threads through the seat. once you do this, put your knee in the middle of the seat and attach the latches to the lower-level anchors. when i say put your knee in the middle of the car seat, it is crucial to use a lot, and i mean a lot, of weight when doing this. keep your weight 