I have a new project that I'm getting ready to work on. I'm putting in a Fan-Tastic vent fan, model 4000 R. I'm installing it in the bedroom of my F/R 8285 IKWS. I have read some of the posts on this project and they all say that it is an easy task. I'm convinced that it is and I know I have to find a power source which does not seem to be a problem (see picture). As you can see there are many wires to choose from. Does it matter which set of wires that I tap into for the positive and negative lines. I have at least 5 choices. If anyone has tackled this type of project and has any helpful suggestions to pass on it would be appreciated. I know to kill the power sources before starting, I just need a nudge as to which wire would be the best choice. I have not received the fan yet so I have not had a chance to look over the instructions. Just trying to get a head start. Thanks for any help, cheers!