Collect one or all boxes on the Planet chapter.

Go to Strut E and latch onto the conveyor belt, then equip a box.

Wait with the box on the conveyor belt station until the light on this station turns blue, then step onto the conveyor belt.

Different boxes send you to different struts.

Box 1 sends you to Strut C; Box 2 sends you to Strut B; Box 3 sends you to Strut A; Box 4 sends you to Strut F.

However, Box 5 leads you into another conveyor station in Strut E.