I 'm not gonna cut the wires. Not unless a working device to use the onboard screen is fabricated.
So, here's the alternative:
Install the camera. And "watch your back", in your mirror.
CCD-color-camera WITH LCD-mirror/screen at only 300$ or so. 120$ cam only.
achteruitrijsystemen: spiegel met ingebouwd LCD en achteruitrijcamera, LN-600MV, LN600MV
Easy to remove the mirror later, when an interface for orig. screen comes available.
Not?
I went to get the camera. 'Jof' is an hour drive from here.
I 'll install the cam and wire it to the center console (first). I then use the AUX-video connection. While handbrake is on (one click) and car moves (very slowly) backward, the screen stays visible.
Current to the camera from a switch. So I can already give 12V to the cam when I see the parkingplace, before getting in reverse, and without having to wait for the cam and screen to respond, when needed.
Only have to put audio to 'aux' as well. Can't be too difficult. Can be done on switchboard, touchscreen or voice-controlled.
That's enough for 'testing'.
Mirror/LCD, later maybe.
JK