The entire dongle including its cord
The dongle
The dongle has three ports:
...
If it is incorrectly in ETH, the terminal will e.g. to say "waiting for ECR" connection after boot.
Securing the cables
This is how you can secure the cords so that they don't slide out of the dongle as easily.
Especially the power cord as it does not have a locking mechanism that RJ45 has.