Fall into the first Samus Eater in Hellway or the second Samus Eater of Alpha Power Bomb Room. After teleporting and passing through the transition, X-Ray climb to reach the space above, to the left of the morph tunnel and bomb block. Samus will be off-camera, but the slopes at the top will push the camera up, indicating when the climb is done.

Entrance condition:

{
  "comeInWithSamusEaterTeleport": {
    "floorPositions": [
      [
        1,
        13
      ],
      [
        2,
        13
      ]
    ],
    "ceilingPositions": []
  }
}

Requires:

"canXRayClimb"
"canBePatient"