5th wheel/gooseneck towing prep group??

Finally got tired of my 03 F250 nickel and dimeing me to death. Actually 400 and 500 dollering me to death. I bit the bullet and bought a 2016 2500 Dodge Ram Tradesman 6.7 liter diesel. It included the 5th wheel/gooseneck towing prep group. From what they told me, it is set up for me to get a fifth wheel hitch and basically drop in, bolt up and go. I previously had a gooseneck ball on my truck and adapter on my fifth wheel.
Anybody help me with what exactly I need to buy and do? Thanks in advance.
The Lost Travellers,
Bruce and Connie