What process is attributed to flinging Scattered Disk Objects (SDOs) into elongated or steeply tilted orbits?

Answer

Gravitational scattering involving Neptune or Uranus

SDOs have been gravitationally flung into their current paths, likely due to past close encounters or gravitational scattering involving the giant planets Neptune or Uranus.

What process is attributed to flinging Scattered Disk Objects (SDOs) into elongated or steeply tilted orbits?
locationSpaceastronomyobjectsKuiper Belt