I hooked them into the ecu wires right below the ecu, per the drawing and ecu pinout provided by tephra in his post. I soldered them to the wires without cutting the original wire. These are my injectors:
http://www.maperformance.com/evo-x-f...127-1100h.html
I purchased mine like 3 years ago, but should be the same. I'm using the plug and play adapters but no resistor pack as far as I know.