Display second address field in order notification

-- HikaShop version -- : 2.6.0
-- Joomla version -- : 3.4.8
-- PHP version -- : 5.6.17
-- Browser(s) name and version -- : Chrome 47.0.2526.110

I've done a fair amount of reading on the forum but have not identified the exact way to accomplish this (thus I'm making this post). Essentially, we have a second address field (so, "Street Address", "Street Address 2", "City", "State" and "Zip"), however it doesn't show in the order notification for new orders. I'm wondering what the best way is to ensure that this field is added to the notification.

Thanks in advance.

Josh