i think it just sits down there in the vast cavern around your shifter. not sure what holds it in place, other than gravity. i am not sure, but that's my guess.
I recommend an EEC reflash.. I'm getting mine back tomorrow! Can't wait!
Price for EEC reflash is less than the price of speedcal + timing adjuster + mil eliminator combined.. not to mention other good stuff that you can do to it!