As jam packed as the bars are, it was a pain to get the turn signal wires out of them. I didn't try to fish the Garmin mount umbilical through them, just tie wrapped them to the bottom of the bars with chrome tie wraps. Rather than lift the tank, I put the cables under the dashboard, doubling back on the usb cable to have the XM puck connector available under the front tank weather flap for when I get the XM not available error and have to unplug it, squirt WD40 on it and plug it back in, once a season. I ran power to the B+ connector under the saddle front tab because I want it live when I stop for fuel so the Zumo doesn't start a new track each time it is powered off and I'm good to go when I start the bike, not having to wait for GPS satellite sync. That's important when leading my friends, as otherwise we're all waiting for the GPS to navigate. I ran one long (4'?) male-male patch cord I bought at an H-D dealer because it is more rugged than the Radio Shack one I tried first. I've left the Garmin audio connector available at the front of the saddle, where this patch cord plus in, as a backup direct patch to my earphones if I forgot to charge the Bluetooth Sena SMH10 headset battery the night before. If fully charged, I get 10 hours of charge. The male-male patch cord plugs into that audio jack on the left side of the bike, wire pushed under the seat and routed to the saddlebag where it is secured my the closing lid through the rubber seal. It doesn't look any worse for wear after 4K mi riding, but I should pick up a spare for when the thing breaks. I always ride with XM and Nav, but have a 16GB microSD in the Zumo with 2,000 songs for when the XM signal fails through the mountains and forests. The Nano is full too as a backup to all that, but above 45mph, the speakers are useless due to wind noise.
I'm retired, so cellphone while riding is not important and I don't have to address a microphone setup or cellphone pairing.
I don't like that mailbox windshield, so I put my '05 stock windshield on the new bike. The rightmost screw of the windshield and 3M outdoor double-faced tape (same stuff body shops use for mounting door protective strips) holds a RAM mount XM mount base and the XM puck magnet stick well to it. The Zumo is on the left handlebar, so I've got 12"+ separation from the Zumo, recommended by Garmin when you use BT to avoid interference.