Howto trigger Button from outside

How can I trigger the button e.g. with a small reed relais? D I need to disassemble the complete device to solder the reed relais parallel to the push button or can this be accomplished from outside?

I would like to use the Doorbell device with existing ring button panel just as a camera and talk to the visitor device. I plan to trigger it with the existing buttons (that trigger sound modules for different buttons) and also would like to attach a small amp to use a bigger speaker. I want to put an extra enclosure (3d printed) around the device.