Product review (5 stars): Do not worry about the door colliding with the screws; each order only includes one, so be sure to double up for a new install.
These were much easier to install than I had anticipated.  I simply loosened the bottom-front feet screws and tilted the entire unit in place enough to get these things in there and push down on the tab with a flat-blade screw driver.  Each one has a bump in it so that the dishwasher cannot possibly rest under the counter at an angle such that the top of the door will run into the fastening screws.