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Slide the torsion springs onto the full-length torsion tube. You may need to gently work with the alignment of the tube and the spring spacers inside the springs to ensure the tube passes through smoothly. Next, insert the spring plug into its corresponding winding unit. Double-check that the spring plug and the winding unit both have matching color codes (left/green, right/orange) before snapping them together. Align the two ears on the spring plug with the two slots in the winding unit and push them firmly until they fully engage. Confirm that both ears are securely in place. Then, slide the drums onto the tube, ensuring that the cable slots on the drums are facing away from the winding unit(s) and the end bearing support. The drums are designated as left ('L') and right ('R') near the cable slot; install the correct drum on each side.