My 2018 F350 factory 5th wheel plug is wired like this. The bed plug can be removed by removing the 2 larger hex bolts holding the bracket to the bed wall.
You can then unplug the bed plug from the wiring behind it. That wiring is actually a separate pigtail and is about 3' long. It has three plugs. One goes into the back of the 5th wheel plug. The other two plugs go into the main wiring harness along the chassis on the driver's side.
So, you can remove the pigtail and make the tie-ins without laying on your back under the truck, then reinstall it.
