Expanded wire lath is what I’m used to seeing it called. No access to the back makes it much trickier for sure…
Which direction is the expected force? Diamond-shaped pieces with a lip along the top at the back and the front at the bottom so they can be angled it you sit in place bit will work for a downward pull. Similar to how some hooks engage with pegboard or slatwall.
You don’t even need the full diamond shape, just the bottom half with a deep enough slotted channel to insert and pull down over the metal to secure it into place. Something like this cleat hanger but with the slot instead of a diagonal wedge.
Expanded wire lath is what I’m used to seeing it called. No access to the back makes it much trickier for sure…
Which direction is the expected force? Diamond-shaped pieces with a lip along the top at the back and the front at the bottom so they can be angled it you sit in place bit will work for a downward pull. Similar to how some hooks engage with pegboard or slatwall.
You don’t even need the full diamond shape, just the bottom half with a deep enough slotted channel to insert and pull down over the metal to secure it into place. Something like this cleat hanger but with the slot instead of a diagonal wedge.