On the MK3, the lighter socket is to the right of the console, therefore I used 2 of the adhesive clips to secure the looped cable to the top of the underside then around the left until it gets to the glove box area. The excess cable was wound up, secured with wire wrap and popped behind the back of the console. Just been out for a drive, no unexpected dash alerts and the camera appeared to make the right start up noise.
It's not a massive job, to me, the worst bit is the transition from the corner of the roof over the plastic pillar trim. The rubber door seal trim can be a bit of a fiddle too but all in, wit a bit of chin rubbing it was probably an hour of humming and ahhring.
I did my CRV a few years ago which was easier to the lack of windscreen plastic and access to the fuse box being straightforward for a hardwire kit which wasn't the same this time, hence the pug in cable.
Also, it doesn't seem to be rattling anywhere at the moment.