This would be the 9'th tivo I have purchased and set up, and the first one that is defeating me. How the hell do you open the battery compartment on the remote (default that comes with a Roamio Pro)? The cover doesn't obviously slide one way or another. There's kinda a lip on one side you can press or pull, but I don't want to do either with too much force. And without knowing which way it goes, I don't know if I'm not pushing hard enough, or if there's a hidden latch, or.... I can't find anything in the materials that ship with it (a simple picture would help so much), or see it in any of the various unboxing videos I've skimmed. I'm feeling so stupid right now... Help?