From the sounds of it Andy, she has got a couple of those outside broadcast cameras that you used to see on top of a small scaffolding tower for sports events etc!!
If you are hardwiring, just remember the devices are usually 5V, with the 12V to 5V dropper in the adaptor that plugs into the car.
I remember one forum owner (not here on TM, I think it was a Volvo forum) who happily hard wired his direct to 12V after removing the cigar lighter plug. Result - one very cooked camera!
