From what i can gather, I am having the same problem as the op in this thread
I started a new thread in hopes to get my problem resolved. The banana plugs (GLS Locking Banana plugs gen 4) will not go all the way into the binding post. Pic below. Problem is on both CS2 center speaker and monitor 60 series II floor standing speakers. And no, they are not in the locked position when inserting. Please help. Thank you.