I have a few wires I need to run under the carpet back to the trunk.
What's a decent run channel for keeping them protected and not creating a big lump under the carpet?

maybe if you ran them along with the ribbon of wires that go from the front to the trunk...it would keep them orderly and not create a lump in the carpet.

maybe if you ran them along with the ribbon of wires that go from the front to the trunk...it would keep them orderly and not create a lump in the carpet.

That's where they are right now.
The factory ribbon is very flat, but a 10ga and an 8ga wire are kinda chubby.
There is no carpet in the car right now, so I am imaging the lump it will create.

I really do need to protect those wires however.

I run them in the channel down the passenger side. Mirror image to the one the ribbon cable follows on the driver side.

the channel should be deep enough to prevent any bulge once the padding and carpet are down.

American Autowire used to have a rubber channel product... have not looked recently to see if they still have it or not.