Bug or User Error not sure B6

Since I haven't tried this before I don't know where the issue is.

I have a simple Fusion composite with a Greenscreen Clip and a Background Clip. I create the Fusion Clip in Edit then go to Fusion.

In Fusion I create the composite. There are times when I want to change the background and can't undo the Fusion Clip in Edit. So I drag a new background to the Fusion Window (with the Nodes) to create a new Node. I then disconnect the old Background Node and connect the new Background Node to the Merge Node setting it as Background. The link happens but the new background does not appear in the composite window.

So is this a bug or am I doing something wrong?

Turns out this is user error! I need to connect the node to the Merge Node holding down the Alt key to select Background. Duh! Works fine.