Although I cannot give specific advice re wire routing on a 3008 – bear in mind that the 12V connection will need to be switched via the ignition, otherwise the dash-cam will flatten the car battery.
Most dash-cams are supplied with a cigar lighter connector, which converts the 12V vehicle voltage to 5Vdc required by the dash-can USB input.
You could consider buying one of these together with a USB A male to USB micro connector of the required length.
https://www.ebay.co.uk/itm/USB-DC12V-to-5V-3A-Step-Down-Voltage-Waterproof-Power-Converter-Regulator-Module/182739726859?epid=2213934408&hash=item2a8c22f20b:g:B5gAAOSw3ONZpqPx
I have a window mounted dash-cam and have managed to hide the connecting wire by poking it behind the window pillar trim. With a centre window mounted dash-cam this could be more tricky.