Change cart icon WooCommerce

Hi,
I used to use a code found on your support to change my shopping cart icon in WooCommerce:

add_filter('avf_default_icons','avia_add_custom_icon', 10, 1);
function avia_add_custom_icon($icons)
{
$icons['cart']	 = array( 'font' =>'awesome-font', 'icon' => 'uf291');
return $icons;
}

I recently installed a new plugin on my installation and I would need to change my cart icon to a new one, used by the plugin.
I found font family name and icon code in the plugin folder and I’m trying to apply it by this nex code:
$icons['cart'] = array( 'font' =>'Woo-Side-Cart', 'icon' => '\e910');
…but it doesn’t work.
Could you please tell me what I am doing wrong?
If needed, you can find a link and credentials to my website in private content.
Thanks a lot!