We have a Freightliner XCS  chassis made in 2021.  Looking for the best way to route the new wiring from the panel,  down the wall, under the floor and up into the service area beneath the bed slide out on the opposite side of the RV.  

The existing wire which handles the signal from the Ultraplex ( Precision Circuits) ( tested that and got an output signal), was determined to be open.  Patched in a wire and got proper operation  of slide out.  Just need a permanent solution to replace my patch cord running across the room.  Thanks