Roof box mounting for integrated roof beams

hello, to the community . am new here , have me registered here once because I assume that anyone can help me here . am dezember 2013 owner of a tourneo custom L1, at that time have ordered the integrated roof carriers as accessories because I had no desire to mount the carriers every time to the car ! now in the summer the Ertse holiday with the car is on and I can’t find any fixtures for my roofbox ! maybe I am looking at the wrong place or turn me on too stupid !!??? bought me at that time so ne ATU dachbox …… for that there must certainly also be docch any fixtures that fit for the old beams of course no more ! say already many thanks to you for your help mfg daniel