The Sales Channel ID is the name given to the integration or connection or channel established in the software. In most cases this is simply the name provided by the user which helps them identify what Tradebox is connecting to.
For an eBay channel it is the name of the user's eBay ID.
When viewing the name in the Sales Channel List, the Sales Channel ID is simply referred to as ID.
When creating a channel in the Sales Channel Setup Wizard, the Sales Channel ID may be referred to as the Account Name.