Towing 2007 RX 350

[Texvegas]

We have a 2015 Vegas 24.1 and want to dolly tow our RX 350. The dolly has steerable pivots for the front wheels of the car. If we leave the key in the ignition so the wheels will turn what do we do to keep from running the battery down?

[Jegdrum5050]

Install a battery shut off switch. Also some ignition switches can be turned after going forward to the acc position as long as it unlocks the steering