Mine was from the EGR diverter to the EGR itself. That hose was melted dried and cracking from the heat of the manifold.

I did see that you got if figured out. Thank you so much for posting the end result with a picture. That could help other people in the future. Nice one.

When you say the EGR vacuum, are you talking about the vacuum that goes into that four-way diverter? Or are you referring to one of the vacuums after that four-way diverted it go to the EGR and the other little valves?