Hi,
The HTML code for that area is output by this line of code:
echo JHTML::_('hikaselect.radiolist', $values, 'data[register][registration_method]', ' onchange="displayRegistration(this)"', 'value', 'text', $this->options['default_registration_view'], false, false, true);
But if you want to add CSS for these elements, you don't need to modify the view file.
You can add your CSS to the frontend CSS of HikaShop:
www.hikashop.com/support/documentation/1...ize-the-display.html
For example:
label[for="data_register_registration_methodlogin"]{ color : red !important; }