I’m assuming the airplane tanks would have been checked before and after refueling.
Engine 1,2,3 had 268 hrs and #4 about 900.
Back in 1944 cockpit ergonomics and man/machine interface wasn’t any priority.
Several sources on YT have B-17 training footage and cockpits are equipped with similar looking switches anywhere they could be fit rather then what we have nowadays.
Not suggesting anything just stating an observation.