Matt's Pinch Weld "How To"

[JumpmasterRT]

UPDATE:
Passenger side:
Since the A/C lines don't allow the use of a rivet, I drilled a hole and used a tree-clip (can get them at Lowe's) in between the HVAC lines and bent pinch weld. Then used a self tapping screw outboard of the pinch weld.

Just anywhere, a specific place or will I know when I see it?