I agree. . .I can't articulate it, but when I look at the "locknut" on the "connector", I can't make sense of what I see.
I mean, this appears to be a 1" "connector" of some sort that I've never seen before. If it's been cut or ground down, it doesn't look like it was reamed.
Then there is the proximity of what appears to be concrete screw (the blue hex head) too close to the "connector" to have adequate purchase on the edge of the hole the 'connector" is in.
I need more information to interpret what I'm seeing.