How to Make a Spot Welding From a Microware Oven Transformer

As in the last video, I bought a mini battery cell solder circuit. But the result was not as expected.
Therefore, I made myself a spot welder to solder new battery cells.
List of main components:
1- Microwave oven transformer 900W
Find it at local shop
2- Timer NY-D01 BTA100
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3- Power cord M35
Find it at local shop
4- Transformer 9V~12V AC
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5- Welding hand balance force
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6- Box (I use wine bottles)
7- DC connector 2.5mm
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8- Wires with different sizes
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9- Nickel Strip
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!!! DO NOT COPY & REUP !!!
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[@hasger1941]

hello how many wire turn to use 2 only ?

[@GoldScrew]

Yes. Only 2 wires!
You can check the diagram in this video.