WAFU WF-018 or HF-011

Did someone integrated security lock WAFU WF-018 or HF-011A in home assistant?

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I just did it the easy way: purchased a two channel relay module on aliexpress and soldered one of the spare remotes I had. In my case I ordered an ewelink module but there are also tuya models for the same price (around 10€).
The other solution which doesn’t involve soldering is using the “official” remote wafu module which has either wifi or Bluetooth versions (also in aliexpress), but in this case you’ll have to work out how to integrate that remote in HA. Not obvious. You choose!

Could you please elaborate? How should I solder to the remote? A photo of the soldered remote would be wonderful.