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kryto,
Try your local car audio store. You can install better aftermarket wires/terminals for much less then $300
You can probably redo your positive and negative cables PLUS run a power wire to the trunk for an aftermaket amp for less then $200.. or just the negative cable for around $30 or less
2 ft of 4 awg wire - $3
4 awg crimp-on ring terminals with boots - $4
paying $7 for a $300 wire - priceless
Or you can get fancy shmancy screw on ring terminals for $10 or so. $22
If you need a place online to buy them, sounddomain.com is always good. I recommend Stinger HPM series power wire. Great quality, very flexible, and cheap! They have ring terminals and battery terminals too if you want those.
DuB,
My bad, yeah probably under $10. I was thinking Stinger/Streetwires single/dual terminal ~$10-20 1/0Cable and crimps but unless you're putting in a high power audio system it would have been overkill.