Edge in the middle right, white facing front
Step 1 / 3
D: Bottom face: turn 90°, front face goes right
The edge is in the middle layer, front right slot, with white facing front.
White cross on the bottom. The edge goes to the bottom front, between the front and white centers. D moves the empty spot to the right, R' drops the edge in, D' turns the cross back.
Step 1 of 3: D. Bottom face: turn 90°, front face goes right