i too pic form web and my idea is



the red is place where metal is stronger and could jack up but if you do that red and black place starts to deforme

on blue i dont want to put because there could be like in old golfs all sill gets destroyed and smashed at time

the nice place is to put on rib like in pic but not always can get to it with jack.

i had idea to make u time metal strengthen in black and red place so that is stronger and car can be lifted there

and it dosnt bend floor.......