I installed my new blue x50 on my brand new Honda accord tonight.
Man, it's nerve-racking to tear apart a BRAND NEW car with less than 400 miles on it! I'm glad I did it though!
I ran the wire up the a pillar, through the headliner and into/out of the light/homelink console.
The remote mute is on the steering column.
Here's a few pics (they are not the best quality.)