How to get into this case?

I have a DBPower Q100 battery pack. This is one of those larger units that will power a laptop, etc.

The sliding power switch seems to have disconnected to the toggle behind it. Basically I cannot turn the unit on and am stuck using only the USB plugs. While looking at the case there are no places for screws so the case must have internal clips to hold it together. Pushing down along the edges I can’t seem to identify any gap that I can get a pry tool or screwdriver into. Any ideas for opening it that will leave the option to close it?

There are no labels covering holes.