DC plug with inside pins for soldering, so you can mount the cable to the plug.
The back of the plug should screwed off, so you can get access to the soldering pins. The back should be screwed on again, where the solder joints can be hidden after .
The DC plug is 5,5mm with a 2,1mm inner pin.
DC plug with inside pins for soldering, so you can mount the cable to the plug.