65 cuda rear seat holddown strap????

I bought this car in boxes! I found a pair of straps bout 12 in long looked almost like seat belt but has round slot on one end. and other end has 2 small holes big enough for coupl e of screws...... I saw identical pair on ebay said they were for holding down the back seat? I guess holding it up???? I would take pic but the new computer is smarter than me ( that's pretty easy!). only thing I can figure is it slides over the end of bar thing on back of the rear seat?? just wondering if early cuda guy can shed some light.... thanks