Use pliers to unscrew the aerator cylinder on the end of each faucet on the floor sink. Twist off the aerator counterclockwise to remove. Save the aerators to reinstall later, if desired, unless you are permanently attaching the washer.
Screw a faucet adapter to the threading on the end of each faucet, turning the adapter by hand. Tighten 1/4 turn with pliers.
Slide the washer over to the sink, so the back of the appliance faces the sink.
Screw on the hot and cold hoses from the washing machine to their adapters on the floor sink faucets. Tighten them with pliers.
Insert the washer drain hose into the sink. Secure the hose to one of the sink's inside walls with duct tape, if necessary, to prevent the hose from flipping out of the sink from the water pressure during the drain cycle.