Unfortunately I didn't take pictures during installation, but I have the Blackvue 750s two-camera system installed in my CX-5; the same system I installed in all of my vehicles.
The installation is unobtrusive, easily removed for transfer to another car at some point in the future, and provides outstanding video,
I use a PowerMagic Pro and fuse taps (hot only when the car is running as well as hot when the car is off).
I set my PowerMagic Pro to cut camera power after 12 hours or if the battery voltage drops to 12.5 volts so that I don't come out to a flat battery.
Power runs from the PowerMagic Pro to the windshield pillar where it is tucked behind the rubber trim (no need to remove A-pillar trim) and then tucked into the windshield header trim.
The front camera is mounted below the sensor pod and behind the rearview mirror.
It is completely hidden behind the rearview mirror for me.
Next; the power and video lead from the front camera is tucked behind the passenger-side windshield header trim until reaching the A-pillar where it tucks behind and then transitions to the rubber trim above the door.
The wire then tucks behind the trim between the doors, behind the rubber trim above the right-rear door, and into the joint between the headliner and rearmost window trim.
Follow Anchorman's instructions to remove the upper hatch trim and fish the wire through the rubber gaiter to reach the rear camera without having an exposed wire.
I didn't need to notch the trim in my CX-5:
Note that my windows are tinted to the maximum allowed darkness and I record excellent video; even at night.
My usual dashcam source is
https://www.thedashcamstore.com/
They offer competitive pricing and outstanding customer service.
For first-timers, a helpful installation video is here:
https://www.thedashcamstore.com/blackvue-dashcam-installation/
Work methodically and everything will come together nicely.
Best of luck with YOUR installation.