Hello and thank you so much for the reply!

I see several holes on mine, and I tried each of them without success.

The big "square holes" just behind the bolts there lead nowhere. I was able to get a very flat screwdriver into the slits just behind the holes (including the one in the middle) and jiggled around, but found no latches. I went in about 4 inches.

Here's a picture.. am I missing something?