How to add custom text before product price in a woodmart slider.

Hello, I want to achieve the next:

I have added the next code to functions.php:

function themeprefix_custom_price_message( $price ) { 
	global $post;
	if(!is_product()) {
		$text =  '<span style="font-size:14px; line-height: 1; color: #e70000; padding-bottom:10px; font-weight:700;" class="precio-descuento">50% OFF en el 2do artículo</span>';
    	return $text . ' ' . $price;
	}else{
		return $price;
	}
}
add_filter( 'woocommerce_get_price_html', 'themeprefix_custom_price_message', 10, 2 );
add_filter( 'woocommerce_cart_item_price', 'themeprefix_custom_price_message', 10, 2 );

This add a message before price for to category products, this is working fine, but for to sliders woodmart is not working.

Look the images that i attached.

How can I add this string to sliders woodmart?