That looks vaguely familiar, but it has been a couple of years. I do seem to recall having to fight that . . . along with a few other stubborn pieces. Seems like I would have gotten in a pointed metal tool or small flathead screwdriver and leverage those tabs holding the bolt in back towards me to allow it to slip out, then tapping them back into place when I re-installed. You might want to wait for another response though if that doesn't seem right as someone else may have a better recollection or have dealt with more recently.