I'm a complete DIY newb. I am trying to install an aftermarket head unit on my '10 WRX. I've gone through all the threads here and in NASIOC. They all assume that you know how to do wiring. What is the proper technique to connect the little colored wires from the head unit to the adapter? Do I just cut those cables, twist them together, and tape them? I don't want to create an unsafe mess. Thanks.