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amplifier power cable.?

 
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the firewall is the metal between the motor and the inside of the car.

 
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...One side will be scorched,, the other side won't be,,,,, Bwahahahahahahaha!!

 
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ebay has everything you need or try the junkyard and try to find it that's all i know

 
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hi.the firewall is the sheet of metal at the back of your dashboard where the steering, pedals, and a/c goes thru from the engine towards inside the cabin.now, usually car manufactured during those times, the steering column mounted on the firewall has a little bit of clearance which is covered with a rubber seal (aka grommet, bushing, etc).you could insert your pwer cable through that rubber seal towards the engine bay and route the cable towards the battery. route the other end of your cable to your intended amp location.remember, the firewall is where the steering column goes thru going outside your car into the engine bay. the rubber seal provide insulation for noise, dust, water and the like from entering you car. make sure that you squeeze you cable in that seal like a wedge.other option is the a/c line. as we all know, the a/c compressor is inside the engine bay and the piping goes inside the car to the cooling coil. you can also use that hole where the pipe line go thru if has a good clearance or space for a cable to fit into. as what i have said, just make sure that there is a rubber seal to avoid water, dust and other to enter from that hole. also, make sure that your cable is not in contact with the pipe because it is a cold pipe which could induce corrosion to your cable.as the same, you could route your cables towards your amp and the battery at the other end.anyway, i hope this helps. best of luck.