Battery disconnect and Backup for tow vehicle (Ford)

Roadmaster installed a solenoid connected to the battery and a "push button" to connect/disconnect the battery. It works really well. Before disconnecting the battery, I open the driver's door, lock the other doors and then go through the pre-towing process. When done, I shut the door and use a spare to lock the driver's door. Now all doors on the toad are locked.