How to repair Scion TC hatchback Handle?

My handle broke a long time ago (This is very common for the TC) the dealer charges a couple hundred for the part and another couple hundred to install it! LAME!! anyway so I bought the part on ebay and now I am having trouble putting it on. Are there any good websites that help you install it. the hardest part I have is the wiring for the on on the part I can not reach it and I don't know what else to do can someone please help?