Corinium Duo

We have a 2018 Corinium Duo with the factory fit garmin reversing camera setup, we are going to be towing and want to fit a full time rear view camera but cannot find a way of getting the cable up the back panel to the camera, has anyone succeeded in this option. Alternatively I could change the wring for the garmin from reversing live feed to a feed on with the ignition, but cannot find where the existing wiring runs from up front.
Any help or advise appreciated

The A/S Service Centre will surely be able to advise.

Reports since Mark left suggest the new person is just as helpful.

Gromit wrote:The A/S Service Centre will surely be able to advise.

Reports since Mark left suggest the new person is just as helpful.

AS refer to dealer, dealer wants to install full camera system at £795.00, so going round in circles.

Can't help directly, but I contemplated changing our fairly useless camera and was advised to crimp a small piece of lead onto a length of fine cord, then drop the lead end down through the hole where the old camera was fitted.

Much fiddling and firtling later (I was told) the lead end might appear under the rear skirt.

Worth spending a few minutes fiddling and firtling. Nothing's lost if it doesn't work . . . except perhaps your bit of lead!!  

Gromit wrote:Can't help directly, but I contemplated changing our fairly useless camera and was advised to crimp a small piece of lead onto a length of fine cord, then drop the lead end down through the hole where the old camera was fitted.

Much fiddling and firtling later (I was told) the lead end might appear under the rear skirt.

Worth spending a few minutes fiddling and firtling. Nothing's lost if it doesn't work . . . except perhaps your bit of lead!!  

I'll give that a go, problem with the Corinium back end is the panel that the camera is mounted on is stuck in place with Butyl mastic strip and the panel cracks when you try to remove, already had camera replaced once Under warranty and it cracked then And the camera cannot be removed with removing it 
Thank you

Try a length of cheese wire to cut through the butyl - if you can get at it.

Otherwise a flexible palette knife might be the answer, but it won't be easy as you already know.