Whilst Motability don’t allow hard wiring into the car (wires into the electrical harness), plug-in wires can usually be tucked away into the trim without causing any issues or damage. Also consider the removable hooks such as ‘Command, damage free hooks’ for areas where the wires cannot be tucked away. These can be removed from any surface without causing any damage when time to return the car.
Hope this helps.
? I will be remembered for nothing but had great fun doing it ?