Huawei O2 4G Pocket Hotspot Plus Mobile WiFi Pro Quick Start Manual page 17

Attaching the Charging Sling
1. Thread the charging sling through the lanyard hole. Use tweezers or other tools to pull it
through.
2. Wrap the charging sling around the groove at the top of the lanyard hole and pull tight.
Note:
For other tools, common household tools may be used to assist.
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