Yes, the quick connector screws onto the thread on the units outlet and there is a connector on the hose side. You can use something like this with your original hose
Or get an extended hose, a 10M one is brilliant with the connector already built into the hose.
Make sure you check the thread size first though, I don't think Karcher and Nilfisk are the same although some sellers say they are. There is a company called qhoses on eBay from what I remember who are great and will make you up an extended hose with a quick connector.