Some wire coat hangers cut to the shape of "U"s work just as good as the tools.If your car has the premium sound and the factory amp you will need the adapter cables to bypass it.Im not sure of yours but mine had that factory amp and premium sound crap and i ended up rewiring anyways for my amps and such so i gutted it.
If it doesnt have premium sound and just the headunit and speakers you need the wiring adapter and you can get this anywhere including wal-mart.Wire the adapter to your new headunits harness and please at the least use shrink wrap if you cant solder it.And then plug it up and go.The wires are all color coded and easy to wire up.