code: def sendToSbs(self, challenge_id, item_id):
          
          # TODO?: multiple item_ids
          method = 'PUT'
          url = 'sbs/challenge/%s/squad' % challenge_id
  
          squad = self.sbsSquad(challenge_id)
          players = []
          moved = False
          n = 0
          for i in squad['squad']['players']:
              if i['itemData']['id'] == item_id:  # item already in sbs  # TODO?: report reason
                  return False
              if i['itemData']['id'] == 0 and not moved:
                  i['itemData']['id'] = item_id
                  moved = True
              players.append({"index": n,
                              "itemData": {"id": i['itemData']['id'],
                                           "dream": False}})
              n += 1
          data = {'players': players}
  
          if not moved:
              return False
          else:
              self.__request__(method, url, data=json.dumps(data))
              return True
docs: Send card FROM CLUB to first free slot in sbs squad.