Where/what do rear cab grommets connect to?

I’ve been working on a rear seat delete / extra storage build for my 2021 DC. Found a bunch of grommets in the process. I’m not sure what any of them run to or how I can use them to run lines between the inside and outside of the cab. Don’t want to cover up any that I might use soon.

Trying to determine where these grommets run to the exterior, or where they might run to another interior area. None of them seem to line up with exterior grommets. I discovered a bunch of grommets under the cab, but they don’t correspond to the same locations. Not sure which grommets run where and how you can route wires through the body. Anyone know? Are there any schematics out there?

here’s the internal grommets


here’s the grommets under the rear cab body I found

 

A little late to the party, but thanks for posting this. What's the thing mounted to the floor in front of the fire extinguisher, anyways? I've been wondering that about my Tundra. It's in the way.

 

That would be the Jack.

 

I can't answer your question off the top of my head but if you go to the link in my sig and view the summer truck work album I pulled all sorts of wires through there. Maybe there is a pic that will help you figure out what you want to do. But mine is crew cab, so I'm not sure how close it is.

 

It's your rear blinker fluid reservoir pump. Don't mess with it or your rear turn signals will be all kinds of messed up.