Hi Chris,
I have a neglected flat screen Ace hardtop. At the screen there are three cleverly braised brackets that slide in the screen groove and have a holed flange. At the front of the hardtop there are three corresponding angle brackets bonded to the fibreglass. At the side there are angle brackets that align with the hood stick anchors. At the rear there is an angle bracket screwed to the fibreglass incorporating two holes that align with the central hood "lift the dot" fasteners. It all looks a bit Heath Robinson, see attached motley photos, so may or not be AC; the top is at least 50 years old, sidescreens are AC so it probably is.
Trust that this isn't confusing
Regards
Ron