Three steps, a couple of minutes.
Check: write “Search Fabulotheca for ATU 510A” — you get a numbered list. Then: “Open 3 and 5”.
If the window did not open (this happens when signing in interrupts the redirect): you will be on Customize → Connectors. Press + → Add custom connector, type “Fabulotheca” in Name, paste your personal link in URL and press Add.
Your account has a “Connect to Claude in one click” button that fills in the address for you. A new connector is added on the claude.ai website (in a browser, including on a phone); after that it also works in the app. On an organisation account, the owner adds the connector first.
*The steps follow the official documentation.