can someone show me a pic of where the firewall in the tc is located

 

The firewall is the wall between the cabin and the engine compartment. Its not a specific location. Basically, look at your pedals and the wall behind them is the firewall, same on the other side.

 

^^ Yup what he said. But on the assumption that you were asking for a place to run a wire through the firewall, there is a rubber grommet on the driver's side if you look along the firewall up behind the dash. You can use that to push wires through. For a better idea, look up Mandos' writeups on audio installs and you'll see what I mean

 

link?

 

Here you go:

 

^^Heh heh :D

 

https://www.scionlife.com/forums/viewtopic.php?t=60981

Word of advice when trying to get your hands up and pushing a 4-0awg wire through that son of a _____: take a sharp knife (one-sided) to slit it, and make sure you haven't trimmed your nails recently, because you will be using them. I had the same day actually, and my index finger ached for days. It sucked.

 

wow....