What I want to do is reconfigure the shortcut for that feature and I don't know where/how to do that.
Wow, I can't help but think that I'm just not getting it.
Same place, file, options, customize ribbon. Left column, drop down and choose "Commands Not in the Ribbon", right column drop down and choose "All Tabs". Left column scroll down to AutoCorrect area, and select the command and use the add button, you may very well need to create a custom group in the tab of your choice, but it seems that you have already successfully done this.
There are two different AutoCorrect Options, command link buttons that you can add, one just includes more tabs to all AutoCorrect options, the other, a more restricted interface. But the options to impact the behavior of the command link buttons from within the GUI is pretty much non-existent, they are what they are and they do what they do.
You may want to read up on macro recording from within Word 2010 and see if you can find a more robust solution to what you are attempting to accomplish or maybe even VBA (Visual Basic for Applications) for Word. This may help get you started
Getting Started with VBA in Word 2010 If you find a more suitable solution to your issue, please consider updating your thread as I would also be interested in whatever you may find.