Duh! I just noticed what I'm pretty sure is my hood at the top of this photo! I see how it has slots that correspond to the CRT
https://www.flickr.com/photos/70039806@N00/11200919143/
Here's a video where I first open mine up and I see now that the hood is already off
https://youtu.be/5MzNEzVnxJg?t=989
Sorry, no idea when I might get to it.