Adesso Bluetooth Mouse - battery cover?

Does anyone have an Adesso Bluetooth (or, I think Mini) Mouse? I can’t figure out how to get the battery cover off. The instruction sheet says “remove the cover under the mouse” but then shows the removed cover from the TOP of the mouse, with no indication of where the latch might be. From the pic, it looks as if it opens from the back end, but all my gentle prying, pinching etc. won’t open it, and I’m afraid of scarring it up or breaking it (it’s a gift I’m trying to get ready for instant service).

Anyone? Bueller?

N’mind, found it. Top cover slides back. I wonder how many broken/scratched mousies are out there - if I had trouble, I guarantee most buyers would be baffled.