New ignition lock does not work with Rex RS450

Hi guys, recently bought me a Rex RS 450. The previous owner had lost the key and then bridged it. He used a cable with 2 crocodile clamps. One terminal hangs at the plus pole of the battery and the other terminal hangs in one of the four contacts of the plug that goes into the CDI (see photo). I wanted to install a new Zundschloss now. I connected it quite normally to the plug, the front and only where it fits in …… but the scooter spri This is my problem, what’s the problem? The lock is new, so it can’t be defective. The strange thing is that the scooter doesn’t jump in again as soon as you put the new lock in the plug. If you separate the lock from the plug again, then the scooter jumps over again. Would be happy if you can give me tips. Lieb Greeting and remains stable.