Where you already able to connect it? Otherwise you can connect the cables according to how they are connected to your transformer. See this post 34 for more details. You should be able to use the way Rubueno describes the wiring.
Make a dumb doorbell smart with Shelly 1 - #102 by arganto - Share
Shelly support group (English Version)
Doorbell button > Shelly Uni config - Configuration - Home
Making a doorbell smart using a Shelly 1 and Home Assistant
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Make a dumb doorbell smart with Shelly 1 - #125 by capsel22
Making a doorbell smart using a Shelly 1 and Home Assistant
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dumb -> smart doorbell wiring help!? : r/homeassistant
Make a dumb doorbell smart with Shelly 1 - #98 by arganto - Share