Как создать выбор галочками из поля со списком в блоке ST200 в Tilda

<div class="checkboxst200"></div> 
<style> 
.checkboxst200 label{ 
    font-family: 'Roboto',Arial,sans-serif; 
    font-weight: 300; 
    color: #000000; 
    font-size: 14px; 
} 
.checkboxst200 p { 
    display: flex; 
    align-items: center; 
    margin-bottom: 4px; 
} 
.checkboxst200 input { 
    height: 18px; 
    width: 18px; 
    margin-right: 6px; 
} 
</style> 
<script> 
$( document ).ready(function() { 
    setTimeout(function(){ 
    $('.t744').each(function(){ 
        $(this).find('select:eq(0)').addClass('selchk'); 
    }); 
     
    //$('.selchk').closest('.t-product__option-variants').hide(); 
    $('.selchk').closest('.t-product__option').after($('.checkboxst200')); 
     
     
     
    $('.selchk').each(function(index){ 
        let selStsize = $(this).find('option').size();     
        for (let i = 0; i < selStsize ; i++) {  
            let txtOpt= $(this).find('option:eq('+i+')').val(); 
            let dataAtrprice =  $(this).find('option:eq('+i+')').attr('data-product-variant-price'); 
            console.log(dataAtrprice);
            if(dataAtrprice==undefined){dataAtrprice=0}; 
            let lbl = index+'-'+i;
            $(this).closest('.t744').find('.checkboxst200').append('<p><input type="checkbox" data-product-variant-price="'+dataAtrprice+'"  id="checkbox_'+lbl+'" value="'+txtOpt+'"><label for="checkbox_'+lbl+'">'+txtOpt+'</label></p>');       
        };     
         
    }); 
    
    $('.selchk').each(function(){ 
        $(this).find('option:first').attr('data-product-variant-price','');       
        $('.selchk').trigger( "change" ); 
    });
    }, 350);  
     
     
    $('.checkboxst200').click(function(){ 
        let checkedlbl = ''; 
        let checkprice= 0; 
        $(this).find('input:checkbox:checked').each(function() { 
            checkedlbl =checkedlbl+ ' +'+ $(this).val(); 
            checkprice=checkprice+  Number.parseInt($(this).attr('data-product-variant-price')); 
        }); 
        
        let curerntSelect = $(this).closest('.t744').find('.selchk'); 
        curerntSelect.find('option:first').attr('data-product-variant-price','+'+checkprice);   
        curerntSelect.find('option:first').val(checkedlbl); 
        let product=$(this).closest(".js-product");
        let recId = $(this).closest(".t-rec").attr('id');
        $('select.selchk')[0].dispatchEvent(new Event('change', { bubbles: true }));
        //t_prod__updatePrice( recId.replace(/[^0-9]/g, '') , product );
        curerntSelect.trigger( "change" ); 
    
    }); 
}); 
</script>