Twin camera problems

OK the story so far
Due to being forced to stay at home I decided that as well as having two cameras and parking sensors at the back I would fit one of those combined camera and parking sensors in a number plate holder at the front. All done working via two way switch through relay to defeat the CANBUS and diodes to stop inference and happy to say I got something right (please dont tell Maureen) EXCEPT
As the camera is designed for the rear of a car the image on the screen appears the "wrong way round" and this is where the little grey cells fail me.
I have tried changing the wiring (before I realised that the image infact was correct for the above reason.)) There is no way on the screen I have to change the image and I cant find a small monitor that allows for correction to rear camera mounted on the front, whilst leaving the other feed the opposite way round
Only thing not yet tried is to cross connect the coax feed but really not holding out much hope so

Any body out there can tell me how to solve this
In Hope David

Thank you for your reply.
I am afraid that you have lost me there, you may well be right, can you be more specific

David

Regret that not available on this screen, also as I said previous I do not wish to reverse the other image.
Think that I will have to look harder for a suitable screen
The cross over coax cable idea did not work

We have a luvly zunzhine Zummerset day today wish we were away but cant.
David

Thank you. I think that the wire you are referring to is the one that makes the monitor switch on when you select reverse not one that will reverse the image on the monitor
David