Help with the Related Hubs widget please

Hello community, 

I have two hubs that I would like to connect with one another and I thought the Related Hubs widget could work for me.

When I try to configure it, it only asks for a name of the widget and the rights, there is not a place where I can select the Hub that I want to point users to.  Am I doing something wrong.

The final widget that gets created looks like this:

It just lists the hub that I am in - does not make any sense.

Am I doing something wrong?

Thanks in advance, 

Irene

PS: I have also seen the use of the left hand side menu to connect to other hubs - how could I do that?