Only the Mark 2 Beocom 6000 (with the INT button to the left of the circular wheel control) has a headset connection, and there is no need to remove any plugs. (Some Mk2s are modified Mk1s and do not have the headset socket because it was not part of the modification) I will attach photos to explain when I get home tomorrow.

Photos as promised: Beocom 6000s Mk2: The one on the left is an upgraded BC6000 Mk1, whereas the one on the right is a Mk2 clearly showing the Earset 1 connection: Login to view image Beocom 6000 Mk1 The two dots on top are merely covers for the IR transmitter/receivers - there is no earset socket: Login to view image You can pick up BC6000 Mk2s quite cheaply nowadays, and it is a worthy upgrade from the Mk1, with a better menu structure and a more reliable RF chip.  Just make sure that the one you are buying definitely has the earset socket as shown. EDIT:  And I am not sure where you live, but one advantage of the Mk2 is that (unlike the Mk1) you can change the language of the menu.  You should therefore be able to buy and use one from another country.