It will likely be a Thetford Valve on the trailer, so you will need either a Thetford connector or a Thetford adapter for the hose. Sometimes hard to find locally, Out of Doors Mart will have them. Buy 2.
Region 3 , 1st VP
Go often to the house of a friend, for weeds choke the unused path........Emerson
Never pick a fight with an old man. If he is too old to fight he will just kill you........a wise old man.