为什么我的键盘链接不上了 Why can't my keyboard be linked?

I have an Apple Magic Keyboard with a soft plastic material made before 2016 (model A1829). It worked fine a few years ago, but now it can't connect to the device.

After comparing it with the same model of others, I suspect that the copper wire of the copper cable may be oxidized. I want to fix it by replacing the wire.

So, what should I pay attention to when replacing the wire? Also, how can I search for relevant repair methods on iFixit?

Similar Logitech Slim Folio

我的2016年以前的软塑胶材质苹果妙控键盘（型号A1829），几年前还能正常使用，现在无法连接设备。对比同款键盘后，推测可能是铜排线（铜导线）氧化导致的问题。想通过更换导线来修复它，请问更换导线时需要注意哪些事项？另外，想在iFixit上搜索该型号键盘的相关维修方法，应该如何搜索?