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I think you'll have to remove the cluster to get at the back. There are little twist plugs that hold the globes as far as I'm aware. I haven't replaced then on my patrol, but did on my previous Nissan and I had to remove the cluster to do so.
Here is the page from the manual (which might help?) and a photo of a cluster I found online for reference.
The things that hold globes are the brown, black and blue plugs in the photo. Someone correct me if I'm wrong.