This Bose Adapter converts your Bose A20 Aviation Headset with Panel Mount (LEMO) connector for use in Two-Plug General Aviation jacks. 

This is a Panel Mount (LEMO) to Two G.A. Plug Adapter.

Simply plug your 6-pin connector from the Bose A20 to this adapter and you'll have dual plugs that can be used in almost any fixed wing aircraft.