I would have thought that movement of spare wheel made this location odd for tools. Also: it is much cheaper, I think, to sew a slot for lug wrench in the spare wheel cover and just drop the alignment tool inside the tool bag then have brackets for them - and this is where it went eventually. As far as I could see on the pictures the amount of brackets in the new spare wheel location was reduced over time and lug wrench went from the floor to the spare wheel cover. Just my theory...