Add "User" custom fields to Guest Form

-- HikaShop version -- : 3.4.0
-- Joomla version -- : 3.x
-- PHP version -- : 7

Hi Guys,

I've got some custom fields in the "User" category - to aid in profile building on the site. I can get them to show up in the normal registration form... But I dont see them in the guest_form - the one that opens when you get an email saying:

Click here to easily create your user account on our website. That way, next time you purchase on our online shop, you won't have to reenter your address.

So how can I get them to display in that form?

Tx
Brett

Thank you Philip, that was exactly the remedy!

Viva la Hikashop!