The YDOC UFL to SMA cable is used to connect an Extrenal antenna to the YDOC .
Select the External Antenna Pins on the YDOC PCB and push the cable socket on to the Antenna stud on the YDOC PCB to the bottom right of thr PCB . Push in hard horizontally so fits tightly and securely . This allows for greater signal gain in low 3/4G signal areas
200mm 1.13 mm Dia Cable
SMA Female Straight Bulkhead