For the basic wiring I prefer to run dedicated ground and fused power to the battery (red and black). It acts as a filter and will remove a lot of alternator and other interference. You can then use a light or multimeter to find the switched power for your (usually yellow) wire. Then just look at your radio wiring for which speaker wire go where. Just as a note, the negative terminals on most speakers is much thinner. Most auto parts stores or radio shack has the smaller audio terminals. If you try to use the big ones they almost always work loose.
"It's not about how hard you can hit, it's about how hard you can get hit and keep moving forward!"
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