Removal of rear bumper

[wullboy]

Hi, i would like to remove my rear bumper on my b7 passat estate, [ as i would like to install a towbar,] now i know about the screws around the wheel arches, and then the ones along the bottom, but, would there be screws behind the L/H & R/H rear lights clusters, and if so, how would i remove the light clusters form the vehicle, i do see small doorways, which i presume are for replacing blown bulbs, but would these doorways also be the way to remove the ligh clusters from thr vrhicle ??? Thanks !!