Big Foot 17 AC help

[Apltrez]

I am about to install a 13,500 Dometic in my trailer. The wiring is stubbed to a steel junction box in my upper cabinet and labeled for AC. In the vent cutout where the AC will be there is a notch cutout in the roof plywood where I suppose the wire is to rune t. Anyone who has done this install recall where the wire channel comes out...
in the cabinet?

under the steel junction box?

somewhere else?


Any time saving help will be greatly appreciated.


Greg