Its a crimp how hard can it be? Buy some connectors use a wire cutter that has a crimp nub and squeeze it together.
Strip the wire of the plastic insulation, place bare metal part of wire into connector, use tool and depress on the crimp move on to the next wire.
How hard is that?
I use both of these:
http://www.amazon.com/Klein-Tools-In...=klein+crimper
or
http://www.amazon.com/Channellock-90...=klein+crimper
I have both, they both work fine. Comes in handy if you ever do any type of wiring esp after market car radios.
If you don't want to buy tools to crimp just solder its easy as well just a lil more time consuming but it is worth it. It will guarantee your connection for both wires are good.
Video on how to solder:
http://www.youtube.com/watch?v=HdbFduodOuo
You don't need a fancy soldering iron either, a basic one will work fine. Solder is cheap, you can buy it at radio shack, fry's electronics, any electronics store will have it.
All the tools mentioned should be basics in any tool box esp if you are getting into car audio or heck even working on cars themselves. If you do not have any of the above items I suggest you invest in them unless you have lots of money to continue to pay people and shops to fix everything on your car.