Tracking Code in 4.x

How do we add tracking code on the confirmation page for 4.x? The KB article is not updated for v4.

Same “method”' just different location. Try

Design/basic/templates/adding/my_changes/hooks/checkout/confirmation.post.tpl

There is no such location in my install of 4.2

change adding to addon. I was on tablet and spell correction took over. Also Design is design