I think asking the dealer would be an excellent Idea as the owners manuals and other docs I have seen are not explicit about this wiring and whether it is standard or optional.
Unless I missed something, the wording in the MY24 manual for the optional high load Aux power panel (p198-199) does not mention anything about the under seat wiring. Given the change of the fuse function in MY24 vehicles I suspect its a standard fitment and if optional then logically it would have be part of the tow hitch option as that is it's function.
Finally I am also starting to suspect that the under seat wiring for MY23 cars is standard and not part of the High Load Aux option. Confusion may have arisen as it was intended for an optional compressor which never was offered,
Cheers
Steve
