Applecalf

Does anyone know how to open the lower portion of the keyfob on this thing?
I've seen a diagram that Mazda put out and I was easily able to take the top off to seperate the key from the remote, but the remote part looks like a solid piece of plastic.

The instructions saw to "insert a small screwdriver in the slot and gently pry open". There are no buttons or latches to push, I tryed putting the screwdriver in a hole to use it as leverage to pry it open. It seems really solid to me and it seemed like I'd crack the plastic before the cover came off. I tried sliding each side to see if it slides off. No luck.

Seems like it should be simple, but I can't find good instructions, Anywhere.
Could someone who's done this before give me some insight about this?