Although our ADSL faceplates come with BT Openreach instructions we thought we would post this up just to be safe.
First off to fit the NTE5 ADSL faceplate splitter you need to remove the front lower half of the NTE5 :-

You could discard the front lower plate but keep it just in case! :-

If your modem or router plugs into your master socket and you have no extension wiring all you ...