Install rear dash cam

[rayzfun]

Hi I'm pretty familiar with installing dash cams in cars and have just got a new Corsa E Elite Premium. Could anybody please advise the best way to install the rear dash cam in the hatch? In other cars there are rubber bungs at the top of the hatch that you can run the cable through and out of (through the rubber cable protectors) into the cabin. No such luck on the Corsa! Any advice would be welcome!