How to add internal sketches to create a surface using the boundary surface feature

Hello guys,

I hope you're doing well. I’ve been working on a project to build a scale model of a Boeing 777 for a few days now. While modeling the nose of the aircraft, I wasn’t able to integrate the windshield window lines (red lines) into the surface to have an accurate profile. You can notice that the windshield lines, which the surface is supposed to follow, are outside the current surface created only by the outer blue lines.I am using the boundary surface feature. Can someone tell me how to resolve the problem? Thank you!