Power Button didn't work (new case)

Hello together,

the case of my SE was broken, so I brought a new one and transferred everything in it.

After the first test I noticed that the power switch didn’t work. so I found out that the new button was different. In the picture you can see that the pin on the right side is missing and in the old case there was a cable.

I tried to install the cable in the new case but it didn’t seem right and also didn’t work.

Thanks for your help!!