https://4.bp.blogspot.com/_Ji5ZKp5toU...600/chase2.jpg
That appears to be the type of ATM theyd be attached to, so I'm guessing they'd either just slip them on over the normal card reader, or pop out the old ones. If they popped out the normal one, they'd have to integrate the wiring, which I doubt they're doing 
Last edited by Acid44; 10-12-2011 at 04:39 AM.
Reason: Left out half a sentence somehow.