Dash Cam DS4

Has anyone installed a dash cam to a DS4 ?
If so where did you take the live feed from ?

Do you mean preview when there is no screen on the dash cam?

I’m thinking of installing a video dash cam but don’t like to see trailing cables everywhere.
Plus I’m not really sure what cam to get.
I’ve looked at a few Nextbase products but have seen some negative reviews regarding the internal battery failing after a while which is not replaceable ?

And I’m thinking about this one (only front 4K) Auto-DVR für Peugeot 308 2021 bis 2023, für Citroen C5 X 2021 bis 2023, für Vauxhall Astra 2022 2023, Plug-and-Play 4K-Dash-Kamera - AliExpress 34
The C5X/P308/Astra L windshield is the same as the DS4 (glass size, angle, mirror housing). The dash cam connects to the mirror assembly, eliminating the need for cables. Unfortunately, there doesn’t seem to be a parking mode. Recordings can be read by removing the card or by phone via Wi-Fi.

So the whole camera assembly fits over the existing mirror housing ?
The existing housing on my DS4 is already big ?
I assume the dash cam takes power from somewhere inside the existing mirror housing ?

3x yes, exactly.