Thanks for asking.
- Please note that the changes you are looking for falls outside the scope of support we can offer. However, to help you get started I am giving you some pointers that you can use. You can output the contents of global block by adding the shortcode in tabs.php file under /wp-content/themes/x/woocommerce/single-product/tabs/. To output the shortcode you can use following code:
<?php echo do_shortcode('[cs_gb id=2046]' ); ?>
cs_gb id=2046 with the global block shortcode. To learn more about do_shortcode function, please take a look at following article:
That being said, before making any changes please make sure to install and setup child theme. Here are the resources that you can use to setup child theme.
Download child theme: https://theme.co/apex/child-themes
2) To remove border from tabs, you can add following CSS under Pro > Theme Options > CSS:
If you would like to learn CSS, please take a look at following resource: https://www.w3schools.com/css/