My previous toad was that vintage so the key had to be in the AUX position to unlock the steering. I purchased and installed a quick disconnect for the negative battery cable to prevent the battery from discharging. Worked for several years. My 2012 Dodge Ram 1500 4x4 doesn't require to have the ignition KEY even installed.
Bob Retired Army Traveling alone now.
2008 Camelot 40 PDQ 4 slides ISL400 towing a 2016 Dodge Ram 1500 4x4 Quadcab
Western MT in summer, AZ, NV in winter