<When you take off and don’t give enough right rudder during climb out (very
common), the fuel will be pushed to the left.  If your tanks are low it’s
possible that the fuel will be pushed away from the fuel pickup and starve the
engine, where if you are on the right tank, the fuel is being pushed towards
the pickup.>

   It seems to me that the fuel will slosh in the same direction as the ball,
usually to the right.