Insert Seat Fillers Pro through the seatbelt buckle using the rectangular slot in the back of the fillers. Pinch back the seat, push them all the way down the buckle, and tuck 'em in neatly. If you are a BMW-fan or otherwise have straight/parallel seat gap in your car - skip the "pinch seat" step. P.S. Make sure that the P-shaped filler's flat side is facing the center console, and the curvy side is facing the seat.
Did everything right but still got a tough time getting Seat Fillers Pro "in there"? Don't you worry! Recline the seat to fully to open up the seatbelt buckle area. You can even sit in the opposite seat when installing to make sure that the other seat is not pushing up against the console.
Too loose or too tight - we want to make it just right! If Seat Fillers Pro fit too loosely, move the seat slightly forward/up. If they feel too tight on the car, move the seats back/down. You don't have to move them to the point where it becomes unusual or uncomfortable to drive. Thanks to the way most center consoles are designed, small moves go a long way!
Would you ever really need to remove your fillers? I can’t think of a reason, guess even black holes get hungry for phones after a while. Anyway, if you must, you can do so in 3 seconds. Pry the filler up from the front to the back, until both your hands can get under the seatbelt slot. Pull up from under the seatbelt buckle, and the entire filler will easily pop off. Seat Fillers Pro are infinitely reusable.
