ESU 51951 Cable Harness 6-Pin Plug According To NEM 651, DCC Color, Length 300mm

Cable Harness:

If the loco in question features no digital interface and you don’t want to cut off the interface-plug of your loco, simply make use of one of our harnesses 51950 or 51951.

Solder in the harness and then plug in the decoder. That’s how the Pro’s do it!