I didn't this recently to my Aloha and followed the steps at http://www.pinwiki.com/wiki/index.php?title=EM_Repair#Adding_an_On.2FOff_Switch_to_an_EM
Don't get me wrong, I read that and Clays guide about 3 times each to get the full picture of what I needed to do. All in all it went pretty smoothly