How do I remove the back panel off my bottom freezer in my Kenmore Elite Refrigerator (model #795.7105)? fixit

I am getting a sheet of ice at the bottom of my freezer, and am looking to access the back to get rid of whatever is blocking the drain and causing this backup. Every video I've seen says you need to remove the back panel by unscrewing the screws, but mine seems to just be one big piece. How the heck do I take this thing off?? back panel

Submitted December 13, 2015 at 04:27AM by ladymarmalade09 http://ift.tt/1J3pKQj fixit