lowley88

https://pinoutguide.com/Car-Stereo-Volkswagen-Porsche/Volkswagen_E-Golf_2014-20_pinout.shtml

I have done this. You are right the "head unit" in the dash is just a screen. You will need to remove the glovebox to gain full access to the actual headunit with the SD card slots. I used a parrot 1:1 SOT lead to fix between the headunit and the stock connector. I then tapped into these wires to avoid any change of damage to the factory wiring. There is a cone shaped grommet that can be accessed from the passenger footwell which is perfect for the power lead. This link details a golf but its the same for the Karoq. https://www.autoinstruct.com.au/manufacturer/volkswagen/mk7-golf/running-cables-through-the-firewall/