Antara trailer coupling assembly

First a good day to all Bin actually since yesterday proud owner of an Antara Cosmo black with circuit 2.0 CDTI. Since afterwards a trailer coupling (to pull to WW ) was attached, I have a few questions about it. Must the bumper to be cut out. My dealer tells me that AHK assembled from factory are different than after mounted. Anyway they have made a huge cutout with the jigsaw inside. Looks totally ugly. I couldn’t even check what’s on the back side of the socket (tilting lamp. Continuous current ect. ). After I moored all this, the master said he would order a new rear apron and I should leave the car still there. Great Unfortunately, I couldn’t look at any other Antara with AHK in the short time. Maybe one of you can give me an info.