Welding the hinges on to the solar panel's moveable rack/frame.
That's 0.024'' L-56 electrode, 10L/min CO2, 22VDC filling a 1.5mm open root.
The frame is 1/8 inch thick, the heavy duty hinge was slightly thinner.
My welder had been acting odd today, later I figured out I had a worn contact tip, I have put about 30 to 35 pounds of wire through that tip so yeah it was worn out.