Buttonholes in poptop

[remigius]

Hi,

Does someone knows what the use is for the buttonholes on the front of the poptop. Its a California coach from 1995

 

[Ch1pbutty]

Is there a toggle /fastener on the inside of van fabric that inserts into the hole when the window is unzipped…ie - roll the fabric down and then fasten to keep it out the way?