You'll need gas hose and misc fittings as well. There should be a tee in the gas pipe with a plug you can remove to hook up the gas hose. ATS should be installed. Look in the ceiling of the front pass-through. There should be a metal junction box with an orange Romex running to it. You run the genset output wires to this box (two black, two whites and ground). You'll also want to relocate the Onan start/stop panel from the front closet to somewhere more accessible. If you pull the panel off the wall behind the front cap, there usually a lot of every wire for the panel (5-wire system) to relocate it to the cabinet facing the entry door.
2013 F350 Lariat Ultimate CC LB