Best bet is power the second AC with an available extra outlet on the pedestal. If there isn't an additional 110 outlet, something like this can be plugged into an available 50 amp plug on the pedestal. Since 50 amps of power will be available consider extension cord with a 20 amp breaker will protect the expensive A/C.
https://smile.amazon.com/EPICORD-Adapter-TT-30P-Female-handle/dp/B07KYKWP6B/ref=sr_1_1_sspa?dchild=1&keywords=50+amp+rv+splitter&qid=1590775993&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExTUNJT0pHTVhKQ1Q4JmVuY3J5cHRlZElkPUEwNDY3NzI1REk0R1ozTlAxNTYwJmVuY3J5cHRlZEFkSWQ9QTA3MjQ0ODEzSFNJUDIzWkJaQzg0JndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==