TWA paid to have it placed on the overhead panel where all three crew members could get to it.
Seems like the TWA B-727 FE panel had an 'AC meters' wafer switch in place of the moved essential power switch. That could sure affect your flow if someone yelled 'Check Essential!'
TWA famously spec'ed toggle switches on the B-727 and other aircraft panels to operate backwards from other carriers. Forward was off for the landing lights on a TWA plane as I recall. Legend had it that it was a Howard Hughes thing.
That LR-JET type rating that many of us here have covers a wide variety of models with many types of wings, engines, reversers and avionics suites.
Still, most of the bizjet fleet sizes are small unlike some of the legacy and cargo airlines with used equipment from other carriers. I once flew for an airline that had 17 different versions of the B-727 (including ex-TWA B-727-231's).