I installed a Thinkware u3000 Pro with Powercell 8 battery (for parking mode, so my car's battery doesn't get drained) into my 2025 ST today. I wanted to add my experience because my situation was slightly different than what I've seen from others in this thread, and maybe it'll help others in a '25 ST in a similar setup.
I did a fuse tap on F60 (glass roof) and added the ground under a bolt, a bit to the right of the fusebox. This bolt sits out of view and is on backward. It is very easy to reach with an 8mm wrench, but you don't see it when looking into the area behind the glovebox. I added a picture to this post: it is roughly where the yellow arrow points at (the wire above, which you see goes behind the bare metal part, is my ground wire). The other fuses mentioned in this thread and elsewhere either didn't exist for me or had always-on power. The Powercell 8 battery has only two wires, ground and accessory (there is no need for always-on power in this setup, and you don't want to charge the backup battery when the car isn't on).
I placed the battery below the passenger seat and ran the wires from behind the glovebox to the passenger seat behind the panels. You can just pull them; they pop off quite easily. The power cable from the battery to the front camera then runs back from the battery the same way the other cable came, and then further up along the A pillar and towards the center of the window, where the dashcam sits (just below the mirror in the middle).
As for the rear camera, I did this on the driver's side (to avoid any interference from the power cables, not sure if this is still an issue, but it was years back, so I just keep doing it this way (I believe this was my 9th install). Basically, this cable went from the middle of my windshield, where the front camera sits, to the driver's side A pillar, then along the roof paneling (the weather strips are easy to pull off and give you easy access) to the B pillar, then the same way to the C pillar, and finally toward the tailgate. I then popped the middle part above the window on the tailgate off for easier access, and popped the wire canal (or whatever it is called, the thing that holds the wires from the car into the tailgate) to fish the cable through (this was not easy, but it looks great now that it's done), and to the top center where the rear camera was going to be.
Took me a few hours, mostly because I had the hardest time finding a suitable fuse (almost all were always on) and because I got stuck fiddling with the USB cable for the rear camera through that channel on the tailgate. It didn't exactly help either that this cable was quite thick lol. It would've been a lot quicker if not for these things.
I'm definitely happy to have a dashcam in my car again. I went without one for a few weeks since I got the ST, and it just didn't feel right. There have been several situations in the past where the dashcam really helped me, especially one time when I learned there was an APB out on me, as I was accused of a hit-and-run in a minor fender bender (it was actually the accuser who drove off when I went to the side of the road and stopped). My footage clearly showed that not only was I not the one doing the hit-and-run, but it also showed the other party breaking various laws before hitting my car (which, by the way, had no damage at all, but they did have damage to their car (which I assume is why they tried blaming me)). So yeah, these things are life savers imho.
Anyway, hopefully this helps someone in the future
