Adding the MPG info buttons to my base model 2011 tundra double cab

So I’ve seen plenty of other threads about this specific problem, most people have luck just by plug and play but my truck is only getting the setup button to work, going from Fahrenheit to Celsius. I pulled the panel off below the steering wheel and I seem to not have all the wires. The wire coming to the vertical buttons only have 6 wires. The wire harness that goes to is missing about 4 connectors and the wire harness that goes to also is missing a lot of wires.
I have not found anyone trying to add this feature to a base model, but when I look closely at the screen for the mpgs I can see the letters behind the screen. Hopefully someone here can help me make this work in my truck.

 

Do a search here and the 2.5 as there are threads on this topic. Here is one.
https://www.tundras.com/threads/adding-info-button-switch.33172/

 

Read here: https://www.tundras.com/threads/drive-monitor-wiring-mpg.88185/

I and others explained how the system works pretty well