I'm hoping you can help me out - I moved into a new apartment in New York that has a lovely cast iron surround and summer cover from Conover & Woolley in NY. The piece is in great condition, but I was wondering if something was wrong with the cover and the surround - simply put I can't figure out how to attach the summer cover.
There are 5 tabs on each side of the surround, slightly inset to the surround itself, but nothing on the back of the cover. As such, I can lean the cover to completely fill the surround opening , but cannot get it to stay, and am worried that it may topple back on to a person (or my cat!

Hoping you can help.
-j