Label cables at both ends before they become a puzzle

A cable label is useful only if you can read it from the end you are looking at.

1. Turn devices off and disconnect power as their instructions require. Trace one cable at a time rather than unplugging everything together.
2. Choose a short device name and put the same label near both ends. Add a number if several identical cables serve different ports.
3. Place labels on the outer insulation, clear of connectors, ventilation and moving parts. Leave enough slack to avoid straining the connection.
4. Reconnect and check each device before starting the next cable. Keep a simple note of any connections that are not obvious.

A label does not prove electrical compatibility. Never treat matching names as permission to swap power adapters; check the device's specified requirements.