Yes, those are correct settings files but unfortunately there are no real WMS servers in those URLs only those setting files. I think that WMS servers are listed in here. But it seems only two of them are freely usable and with very small scales, so those are not very useful.
It seems that that WMTS server uses map tiles with pixel size 512x512 and only 256x256 works in Mapsi, so at least at the moment that can't be used.