Personally when I saw the recall remedy from Jayco I was shocked that they consider this rats nest a correct repair. There was no way I was going to have my new trailer wiring looking like that! The rats nest picture is from their remedy guide.
I completed the repair myself and installed the correct breaker https://a.co/5Z4NAAW
If you take the loom apart and route all the wires neatly there is not even a need to add any new wire at all.
My completed repair looks much better and is safer! When taking off the junction box cover the factory only put the 30 amp fuse holder inline between the tow vehicle 12 volt feed and the trailer 12 volt circuit. They put the trailer battery connection direct to the trailer feed.
Also when I was there all of the screws holding the loops that hold the loom were broken off! Not impressed.