I would just add that if you decide not to use a premade harness do yourself a favor and get a good crimping tool, as suggested in an earlier post. Look for a good brand and definitely controlled cycle, meaning the tool will not allow you to finish the crimp until proper pressure has been applied. Brands to look for are Panduit, AMP, Klein, Thomas & Betts. New ones can be spendy but used should be fine and you wont regret it. It should look something like this: