amp in a ’94 buick lesabre

I'm hitting a thick wall in my installation, and that's the firewall. I have no clue where to pass the power cable from the engine area to the car interior. I took apart a lot of the dashboard and many other panels but I can't find a place where the cables go in and out. Rather than keep on dismantling the whole car I would like to know if somebody that has the same car already did this and can tell me exactly where the hole is so at least I know where to start looking. ThanksSebastian R.

You might be MAKING one for your car... It has happened! You can't always expect that there is going to be a pre-made hole, just sitting there, waiting for you to pass a big wire throught it, for every car.It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."