Krissy on "Disabling auto updates"

I read the huge article written Andrew, I just want to confirm something:

Where exactly am I adding the following term:

# Disables all core updates:
define( 'WP_AUTO_UPDATE_CORE', false );

wp-config?

My host has disabled just about every blog running on 3.7.1 for me claiming that I'm violating their MySQL Usage TOS. I know it couldn't have been 'hack' related as I make it a point to keep everything as secure as possible, the only major change was upgrading from 3.7 to 3.7.1.

Either way I have 10 years of blog archives (on multiple domains) that I can no longer access... and it's 100% because of this recent WP update.

So to confirm, is it going in wp-config?