I have a panasonic nv-mx500 with a ND filter adapter(43 mm). I want to buy a wide angle and a tele lens. Is there a fixed order how to attach the lenses. I mean like this, first cameralens, second WA or Tele and third the filter or is it cameralens, second filter and third the WA or telelens. What is the best thing tot do. Is there any difference in quality?

Place a filter in the front of the wide angle adaptor, not in-between the cam and the adaptor, but you can always try that and see what happens. :-))

Which adaptors are you going to buy? With some wide angles, plus an ND, the iris may be forced fully open, so vignetting is a strong possibility. Actually, vignetting is a strong possibility with any wide angle adaptor in front, and worse in-between an with a wide angle. That's why many wide angles don't even come with front filter threads. I would get one with threads, however.