I think that there is some confusions between top tethers and LATCH. Not all cars or SUV's have LATCH in all 3 across seating positions, and you need to read the manual for correct LATCH positions. In the pdf that iainb posted ONLY the outer (window seats) have LATCH. It reads "The lower anchorages (bars) are used for installing a child restraint system only on the rear seat window-side seating positions. For each window-side seating position, two lower anchorages are provided. Each lower anchorage is located behind the cover of seatback bottom." DougNuts You can properly install a seat using the using a shoulder or lap belt, LATCH is installed to make installation easier and to help with misuse.