I understand that by mistake, you have removed your Slingbox information from your Sling Account. Now, you want to know how to retrieve its information in order to register it on your Sling Account one more time.
As the first step, you must gather your Slingbox ID. This piece of information is very important since you will need it in order to register your Slingbox on your Sling Account. With this in mind, I recommend you to check the following links:
Once you get this information, you must access your Sling Account in order to add your Slingbox. Make sure to check these links for further details: