1. Open the Onion Router app and make sure you have the appropriate version installed. In the app, find and click on the "Settings" option.

2. In the settings page, find and click on the "Network" option, and in the network settings page, find and click on the "Bridge" option.

3. In the bridge settings page, you can set the bridge name, password, network mode, etc. After completing the settings, click the "Save" button to save the configuration, and wait for a period of time for Onion to automatically connect to the desired bridge.