You have to unhook the back of the seat by lifting up then pull towards you , I don't think it will move far enough forward to allow you to slide the separator in because of the arm rest , remove the arm rests and that will give you enough room . You will see a hook on the upper left and right side that the seat top rests on , these are the same hooks that the separator will rest on as well as the insolation pad . Once you have the back seat pulled forward it will all become self explanatory. Take a look at the pad under the package tray while your at it I'm sure it will need replacing if its even there at all .