That gold-coloured BNC-SMA adapter is the same one as I use on my Yaesu FT1D 2m FM HT with my trusty Diamond RH770 ½-wave whip. In gusty wind the waving about of the RH770 can put a strain on the adapter and lesser brands have failed on me (3 times) mid-activation [the SMA pin snaps] but this adapter has lasted for many years (to date). I use a fibre washer between the adapter and HT case to ensure the connection is rain resistant.