If the detail/spec requires screws or fasteners, install them as shown using the correct type, location, and spacing. If you missed them, do not cover the joint; go back and fasten before seal/inspection.
Verify screw type/location if the detail requires it
Check for distortion, stripped holes, and seal path issues
Ask foreman
In Rectangular Duct Assembly: S-and-Drive, I’m looking at: What do I do when not screwing the joint where detail or spec requires it? What should I verify before I cut, drill, seal, cover, move, or install?
Do not
Do not over-screw, strip, distort, or use screws to make up for a bad fit.