taking apart mdf cabinet - mystery fasteners
Hi, my parents have a particle board cabinet that needs to come apart for transport (OK, I am praying that it can come apart for transport). I am familiar with regular KD fasteners but we can't figure these out.
From the outside of the cabinet, no fasteners are visible. Inside, from the underside of the top and of each shelf, there are these very strange plastic caps, with slots, recessed in a 3/4-1" hole. I'm sorry my photo of the inside of the cabinet is a bit fuzzy (wasn't wearing my glasses, sorry!), but you might get the general idea.
The caps will turn a bit, but won't come out, and we have no idea what is under them. Are the caps the fasteners, or are there screws of some sort underneath?
We are hesitant to force the caps off without understanding what they are or what they are intended to do. Wondering if anyone can provide some guidance for detaching them.