"Add to cart" button, possible to change html?

-- HikaShop version -- : 2.3.5

In file quantity.php in my override file i find function for "add to cart" button:

echo $this->cart->displayButton(JText::_('TPL_VIBIGA_BUY_THIS_TEMP_NOW') . ' ','add',$this->params,$url,$this->ajax,'',$max,$min);

Hello,
A solution can be to directly edit the code of the "displayButton" function via "administrator\components\com_hikashop\helpers\cart.php" which will require development skills.

It's possible to override this file? I don't want to edit core files.