I just bought my x50 from radarbusters and decided I was going to hardwire it myself. I took it to my friends house (whos a mechanic and knows these things). We sat there for about 2 hours and could not find a power source up where I wanted it. According to my friend the wires up there are mostly data wires and some weird electrical system. We gave up and I decided to give Best Buy a call. Im usually the most anti best buy person there is but I thought I would give them a shot. They quoted my $30 which is really inexpensive for Best Buy pricing.
Took my car in and they finished in an hour. They did an amazing job. I dont even see the wire.