Beautiful work, Carl.
When I mounted my Icom-7000 in my Towncar I went to an automotive stereo shop and paid them to run all of the wiring and they also attached a couple of ground straps to the body as well.
Cheap. Less than $100 for sure and the wires are "gone". I have no idea how these auto guys hide the wires in the vehicle like that!
The owner of the stereo shop told me that lots of folks have him install "CB" radios
in their vehicles. Not sure if that comment applies to just this shop, all auto-stereo shops or was just total BS :-)
But the price was right, the work was well done and the wires are very hidden! Not sure you want to trust your RV rig to an auto-stereo shop, though
.
Good luck putting the finishing touches on the install. That really is nice work there Carl
!