Openings in rear/bottom of cab?

I need to run antenna wire from the roof and tailgate into the cab.

I’ve previously used the opening under the front passenger seat. However, I’m mounting the radio body on the back wall of my cab, and using that opening requires several extra feet of wire.

Ideally I’m looking for one behind/under the rear cubbies.
Truck is a ‘14 DCSB.

What have y’all seen?

Does anyone have a pic of the rear gutted; like when installing the vinyl flooring?
I found pics of the front empty, but not the rear of a double cab.

 

There are rubber grommets you can go through. That’s where I ran the CB antenna cable to the rear of the bed.

 

Which one did you use?

 

There are grommets on the back wall of the cab (I used one on the driver side to run my CB Antenna cable) and also pretty sure some on the back floor if I recall correctly.

 

I found several images that proved helpful. I ended up using an entrance above the driveshaft, under the rear seats.

None of these photos were taken by me, but they do a pretty decent job showing what's available with the floor removed.