Under the kitchen worktop, a space has been kept free where you can put your own a dishwasher or washing machine or a combination washer-dryer. You can only connect one appliance here.

There is no central laundry room. 

How do I connect the washing machine?
The dishwasher or washing machine needs to be connected to the sewer. The connection for this is under the kitchen worktop and under the sink.
Make sure to dismantle the spout first and remove the built-in plug. This plug is fitted in this connection to prevent sewage odours. Connect the hose to the spout specifically for it, make the connection watertight and try to keep it that way.