It would be great if it was possible to configure which Relay output the unlock button controls. I learned the hard way (trial and error) that the intercom unlock button (or Hik-Connect app unlock) controls the output relay on the outdoor unit while the button on my outdoor unit controls the output relays on the indoor unit.
I connected a gate remote button to the indoor units output relay and was baffled when I realised that ringing the doorbell opens the gate :-D It would provide quite a bit of flexibility to the kit if one could configure which (indoor or outdoor) relay is controlled by which button