I have mine into 12v socket on current car then tucked behind glove box and with an extension lead. It is just tucked into edge of trim up door across where this is a jin in molding and around window pushed in with a plastic spatula so only bit of cable visible is where it comes to camera itself. Cable can be pulled out with no tools required. 
Cars On Motability
2009 Citroen C4 Grand Picasso
2012 Vauxhall Antara
2013 Skoda Superb Estate
2016 Seat Alhambra
2020 Seat Tarraco
2021 Ford Kuga
2024 Nissan X-Trail left in Sep 25