While some people leave the RCA set-up as it is at the end of their harness, I decided to customize it a little further.  I took a RCA cable, cut it in half and plugged the male ends into my new harness.  I then ran the wires to the shifter area.  I opened up my other Fry's purchase, a couple of RCA wall-outlet jacks, drilled a couple holes into the plastic trim and installed them there.  That way, I wouldn't have wire hanging around when my Aux input wasn't in use, and the jacks would be readily accessible for anything I wanted to plug in.  I took the cut ends of the RCA wire and soldered them to the installed jacks and then popped all the trim back into place.

Steve decided to do the same for his truck and and installed a couple input jacks into his dash just underneath his radio.  I can see the benefits of either location, but the console placement worked out best for me since it was right next to where I planned to install my Sirius radio and where I set my GPS/MP3 player.

The whole install was pretty simple and self explanatory.  It sounds complicated with the solder and splice work, but it wasn't that big of a deal. 

The sound quality is great.  You seem to lose a couple notches of volume- I usually don't push it over 17 with CD's, 22 seems to be comparable with the Aux engaged.  I was impressed how factory it turned out looking especially with the switches.  I really enjoy using my GPS to to pump my MP3's out through the X's speakers.  As a plus, when the guidance system is in use, it automatically lowers the volume to point out directions.

*Thanks to the guys at XOC for the engineering and helpful instructions