Wiring amp power for a Mazda Protege5

[rdub]

Does anyone know the best way to wire 4 gauge power for a 2003 Mazda P5 from the battery through the engine firewall?

Looking under the dash, there doesn't look like theres any existing space through factory wiring to go through.

Please forward any ideas. Prefer not to cut through firewall!

Thanks!

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[pavengmike6 10+ year member]

There are some rubber boots that the other wire bundles go through. You could slice a small area through one and run it through that. Then seal the hole with Silicone and you are on your way. Not the best way, but it will work.