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Make sure your wires are large enough gauge for the length/amperage you need. Put your wires in loom. Use a grommet anywhere you penetrate metal. Think about how you're going to route your wires beforehand. Use a relay, waterproof preferred. Place your fuse as close to the battery as you can. Solder and heat shrink any connections. Put a dab of dielectric grease on the pins in your plugs before connecting.
For your first time, a pre-made loom may be your best bet.
Mostly, take your time and enjoy the process.
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