hi
mine are inline with the rest of the sill
the sill jacking points are for the emergency jack only
if there used with a trolley jack, they usually damage the lip and most of the time crush the sill covers and floor covers
also, there really prone to completely rotting away, the sills, especially to the rear of the car, first signs are rear arches start to rust
it worth removing the plastic cover and checking them
cheers
Joe