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Take off the plastic cover under the front glove compartment. There are 3 tabs you need to push. You can also twist the courtesy light to fully dislocate the cover from the attached wire.
Under there, you will see a fuse box. These are what you will tap into for both on/off (p/outlet) and parking mode (Dome) functions. I used a ROVE connector with type C connection to add an old cam (Coxpal) I had from my old LX570. I prefer the dual cams as it eases the install not having to install a separate camera with another tap, etc.
You will then take off the side cover of the dash and pull the plastic cover near the right of the passenger footwell. There is where you will find a tap for ground and can start hiding and pulling the wire over to the pillar airbag and up to where the rear view mirror is located.