I have the Thinkware u1000 + usb cable. I assume its a bit thicker than the one in the video, but I was able to tuck it a bit. I'll try to get a picture of it when I get home this evening.
I have the same setup. I wedged the a thin trim removal tool like in the video to get enough space to tuck the cable in. Still not super clean, but enough to hide it.
I did it in my garage. Took my time and it was pretty straight forward. I just made sure I matched up the right collars to each bolt and greased the crap out of them.
I had the same issue and trimmed the offending piece off. If you undo the stitching , trim, and stich it back together, you can't really tell its been modified.