megane grandtour top anchors

Hi guys,



I would appreciate help regarding top anchors installation for megane 3:





My renault dealer screw with car ordering and he orders car without retain net and they are trying to install it aftermarket. But cutting interior roof is an issue, because they don't have any scheme how to do it, so they don't want to cut roof getting this 8200186000 part installed.



Do anybody knows if some guides exist or does anybody have this anchor his MEgane and would share some pictures with marked dimensions so we would be able to cut if in.



Thanks!