OK, so an update....
Proof of concept is proven!
Temporary connections were made to both the Mr12volt box and the cigar lighter socket wiring. Powered car on and phone detects proper charging and Mr12volt also sees phone and connects fully.
So now I've just got to get the best location to mount the new socket, unfortunately these sockets require a fair amount of space behind them so I've got to be careful .
Proof of concept is proven!
Temporary connections were made to both the Mr12volt box and the cigar lighter socket wiring. Powered car on and phone detects proper charging and Mr12volt also sees phone and connects fully.
So now I've just got to get the best location to mount the new socket, unfortunately these sockets require a fair amount of space behind them so I've got to be careful .