I checked my old pictures and found a picture of my procedure. The manifold has not yet been drilled in this picture, but it was placed in the rear passage into the turbo, right where the red spot appears in the picture. Also notice the corrugated material I placed between the turbo and the manifold after loosening, but not removing the mounting bolts. That was placed there to eliminate any shavings from the drilling getting into the turbo. It was then removed and the mounting bolts re-tightened after all chips were blown out.