customization tabular layout

-- HikaShop version -- : 2.6.3
-- Joomla version -- : 3.5.1

Hi Hikashop the best support team,

I ask for advice please. I'm trying to add a custom tab on the product tab (see image1.png). I followed the instructions in the forum hikashop.com/forum/product-category-disp...t-customisation.html nad add the code to row 229 and 256 to file show_tabular.php (see show_tabular.txt) the advice of Xavier.

Everything works great, custom tab on the front-end product displays. I also see in the product card text entry box for each product but I do not know where to put the last piece of code by Xavier to the inserted text on the card product display at the frontend.

code from Xavier:
And finally in the tab use this kind of code:
<?php echo $this->elements->CUSTOMFIELDNAME; ?>

Could you give me an advice please?

Many many thanks,

Pavel