Add a custom panel on a tab of Sunstone

I am trying to add a new info panel on the VMs tab of Sunstone, so I can display other custom information. I have copied the info panel, changed the names and IDs I found comparing with other panels and adding this one on the view too, but nothing is displayed. I’m also on dev and I have followed (I think) all logical steps, is there some other file or configuration I have missed?