Ok, so others don't have to go through my confusion too: the antenna connectors are in IPEX MHF-4 format, not U.FL. (Intel kindly does not specify them). This means that the U.FL to SMA adapters (pigtails) or antennas are not compatible, they do not "click". In addition, those marked "MHF" usually do not fit either, because MHF(-1), AMC, UMCC, are all compatible with Hirose U.FL. *But MHF-4 is smaller. . A comparison can be seen here: https://www.mikrocontroller.net/topic/404486 https://www.data-alliance.net/mhf-series-mhf1-mhf3-mhf4/ (I think Hirose W.FL corresponds to the MHF-4, is that right?) . That the whole thing must be so difficult.... .