Question about washing machine hook up

[Island Retreat]

Hello all. I'm new to the forum and have a new 2017 Keystone 39mks Retreat. It came plumbed for a washing machine. I have purchased and installed a small capacity machine, no dryer. The owner's manual does not give specific information on whether wash water goes into a holding tank or whether it is direct drain. However there is a separate drain, water dump line for it with a valve. The valve is about 2 inches in diameter. Am I to assume it doesn't go into a holding tank and is direct flow. If so, is there a special type of hose to connect.
Thanks so much.