Add engraving/normal map to shader workflow?

Hello! I have this object I’d like to add an engraving to. The problem is I have a procedural wood texture on it (followed a tutorial on YT), and I’m not sure how to make the engraving a part of the shader map. I want the engraving to appear on a specific part of the mesh.

I do have the engraving baked as a normal map already, just not sure how to combine the nodes/position the normal map.

Thank you!

Existing shader for more context:

You should be able to use Normal map in Bump Node Normal input:
Note: if the map uses another UV map to position the image, you might want to plug correct UVmap Node explicitly into Image Texture Vector input.