How to connect the ignition advance circuit from Passat oil to gas?

The throttle sensor has two wires, so it doesn't need to be disconnected. Just peel off one of them and connect the yellow wire. But these two wires can't be connected casually, which one is measured by multimeter.

First, peel off one of the two wires of the throttle sensor slightly, and measure the AC voltage with a multimeter. The red stylus is connected to the peeling line and the black stylus is connected to the iron.

When idling, the voltage should be around 0.5v, otherwise it is another line. Wiring and angle are very important. The angle is 12 or 15. Try it yourself to see which angle is good.