Hi All! On fitting the rear Seat Belts, I am looking to place the reinforcing plate upside down underneath the floor, weld into place and then fit a very large washer and, screw the bolt and seatbelt plate down through the floor into the plate! This helps the underside of the seat as the nut on top of the plate would make the seat uneven.? or I can leave the seatbelts out of the back and just fit front 3 point statics? What do you think??