How to adjust the harness straps at the hip for extra room on the Britax Marathon ClickTight, Boulevard ClickTight, and Advocate ClickTight convertible car seats. IMPORTANT: The harness must be in the short length for children under 2 years old. Prior to using the seat, ensure that the harness straps are securely connected to the anchors. **Refer to your user guide for complete installation instructions.
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