Remapping Default Controller Button

[JScripto]

I am trying to remap the default NES buttons and I am having some difficulty. Everything works fine until I add the EJS_defaultControls variable. Can someone assist me with the code? I'm sure I'm doing something wrong. Thanks in advance.

     <script>
            EJS_player = "#game";
            EJS_core = "nes";
            EJS_gameName = "super_mario_bros";
            EJS_color = "#0064ff";
            EJS_pathtodata = "https://cdn.jsdelivr.net/gh/EmulatorJS/EmulatorJS@latest/data/";
            EJS_gameUrl = "super_mario_bros.zip";
	    
            EJS_defaultControls = {
        0: {
            0: {
                'value': 'x',
                'value2': 'BUTTON_1'

            },
            8: {
                'value': 'z',
                'value2': 'BUTTON_3'
            },
        },

    },
	
	{
    0: 'B',
    8: 'A',

};
					
        </script>