Unable to connect nodes

Hello and good day everyone.

I have been follow a tutorial on this website ( Unreal Engine 4 UI Tutorial | ) and I have run into a inability to connect nodes.
I attached a screen shot of what I have and what I suppose to do.

What am I doing wrong and what do I do to correct it?

Have you made the variable called ‘game manager’ in the widget?

I don’t know if I did. I am going to what the picture shows me on the right. Is that a variable that could be created by right clicking on the graph?

Yes, it could.

What is the difference between get and set game manager nodes? Do you have a reference to this nodes that I could read?

Never mind I figured it out.