Not long after getting our RV home, while adding other things, I was underneath, and wrapped, tied up, many wire runs and connectors. Keep in mind, at least for a C, the cut away likely sits out in the weather for several months before the house is put on. In my case, this sit out time was in winter, and I could see the effects, such as starting of surface rust.
By securing the wires better, and at least wrapping the connectors for extra protection, it makes it less dicey to spray underneath to clean (for rust prevention application, and for routine cleanup).
This is something anyone can do, who is willing and able to crawl under.
2016 SS 2250 E450