User should navigate to device manager UI page and in the search for the device the user added.
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Corresponding to the device details user should click on 'Edit Device Extra Properties' button. A pop-up will be shown.
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In the pop-up user should add 'cdrouterinstance' under Name category and base url of cdrouter that the device is connected to, under value category. and click on add button as well as update button at the bottom.
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Every time a new CDRouter is connected to this device, the user should update the base URL of CDRouter connected to the corresponding device.
Basically it is used for locking and unlocking of devices.