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Haven't done in the Born, but in my last car is just ran the cable under the cieling trim and down by the A-pilar and into the fuse box.

You can connect it to an existing fuse using a fuse tap on a suitable existing fuse, and then use a power suply that is meant to be hardwired into the car.

A kit like this would work.

https://www.youtube.com/watch?v=C4CkStK45io