I am retro-engineering my e39 and wantt to tap into the connection at the driver C-pillar of the diversity antenna. The end of the cable that has continuity to my head unit is what I am puzzled about..this end "plugs -actually as you see it has a slip threaded connector...this is actually the female as far as the central wire - the antenna amp has the threaded "male" stubs that this screws into" into the antenna amp...I want to install a rear deck antenna and tap into this cable and trying to avoid soldering on a new connector to go a to regular antenna fitting. This looks like SMB but not exactly...basically looking for info on what type of connector this is. The other end is the fakra connection at my head unit. Appreciate any shared knowledge! Thanks!