How to install dash cam and hide all the cables (2 channel car camera for front and back)

Installation of front and rear dash cam on your car with all your cables nicely hidden and without use of cigarette plug. Goal is to have it nice and neat! You can do this yourself without any special skills on your car, all you need is patience and basic tools. camera I used is Viofo A139 pro 4K front and back and installing on BMW 5 series touring. Camera: https://viofo.com/content/28-viofo-4k-dash-cam/ OBD II - power source https://www.garmin.com/en-US/p/735279