The current crop of radio cards for the m.2 interface are very small. Much smaller the the 1/2 Mini-PCIe cards. I am dealing with the BCM94352Z WiFi/BT card for the m.2 socket. I needed RF Cables for my G4 Cube project and found that this card requires cables with the "MHF4" connector. Here is a photo showing a u.fl connector and a MHF4 connector. The u.fl connector is about 3 mm wide and the MHF4 is just 2 mm wide. To install these cables to the radio card takes very good vision, a steady hand and a good set of tweezers. You can find the RF cables on Amazon by searching on MHF4. Good modding.