Salesforce connector and Teams Channel

Haven't used this connector in particular, but generally speaking connectors you've already configured are managed from the "Manage > Configured" menu on top, whereas you seem to be looking at the connector entry in the general list. Similarly, you will find accounts under Manage > My Accounts. Of course, it all boils down as to whether the connector itself supports such operation, in some cases you might have to remove the connector and re-add it in order to change the settings.