like my old van. from time to time i transport my mother and her motorized chair. does anyone know the weight ratings on the factory loops in the rear? the grand caravan i removed the center row of seats....but they had 2X as many seat loops. since it will go in the rear. i was thinking of strapping from seat floor loop(strong) to the rear corner loops. will they be strong enough or are they just a hook to locate dog box etc?