I am jealous. I have a 2021 model and does not have that invertor prep wiring. I installed my invertor in the storage area, along with my Lithium battery and just plug the shore power lead into the invertor when I want AC. Caution! You must remove the fuse from the power panel that sends 12 DC to the battery, else you will be charging the battery via the invertor!
I purchased an invertor with a remote control so I could easily turn it on and off to save draining the battery when 110v not needed.
BTW. I have solar, so don't need to charge battery from shore power, and as the trailer came with lead acid batteries, it would not charge my Lithium very well anyway.
When invertor (2000w) is on, all outlets have 120v and I can use microwave, tv, plug in toaster, Starlink etc. Obviously not air conditioner.
Rig: 2021 - 212QBW Rocky & Baha options.
TV: 2022 Ram 2500 Diesel Laramie