For steam loco users. SoundTraxx has it. You can plug in or solder the decoder wires.
The DBX-9000 is a compact 9 wire connector and harness assembly for use with JST connectors as used in many decoders.
Many online DCC sellers have it. Search for soundtraxx dbx-9000.
http://1.bp.blogspot.com/_5UAo3E2l31A/S3Mi5lydmaI/AAAAAAAAAUI/Lsn2hSDb9j8/s1600-h/dbx9000.jpg
Rich
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.