I routed over top of the windshield, then followed the trim down to the break, which allowed me to cross to the doorframe and hide a large portion under the weatherstrip. I think there's another break in the trim to cut back to the fuse box, and the excess is just zip tied inside there.
As to fuses, I used a Garmin cable that required a 12v and 5v rail, the 12v being hot even when off. I used a multimeter to scope out empty locations, and used "Buddy" fuse kits to draw from the box without needing to replace an existing or tap a new fuse.
I'll try to remember and update with a picture, but I believe, if memory serves, that the top row of fuses are 12v and always hot, the middle row are 5v and on ACC.
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