For the details about the wizard options, see Schedule Database Fleet Backup to Recovery Appliance. For the options that are unique to scheduling backup for a group of databases to Recovery Appliance, see below:

Targets page:

Select Group for the Target Type and select one or more groups. All databases within the specified groups that are already configured to backup to a Recovery Appliance will be backed up. Databases that subsequently join the groups and that are configured will be backed up in the next scheduled procedure implementation.