code: function(terminalConfig) {
  
     	var klass = WireIt.terminalClassFromXtype(terminalConfig.xtype);
  
        // Instanciate the terminal
        var term = new klass(this.el, terminalConfig, this);
     
        // Add the terminal to the list
        this.terminals.push( term );
     
        // Event listeners
        term.eventAddWire.subscribe(this.onAddWire, this, true);
        term.eventRemoveWire.subscribe(this.onRemoveWire, this, true);
     
        return term;
     }
docs: Instanciate the terminal from the class pointer "xtype" (default WireIt.Terminal)
  @method addTerminal
  @return {WireIt.Terminal}  terminal Created terminal