First of all, you have to define and save your connections on our web application.
Your connections are only accesible from Tekla if you "publish to BIM".
Double click the component and pick your profiles in the order indicated on the plugin picture.
The plugin searches for possible solutions (project, structure, and profile pair) and places the first found.
The connection is market red, yellow or green. Following the well known Tekla standard.
If you have more than 1 calculation in the project/structure with the same profile pair, the plugin will prompt you to choose one.
Last, if you have to change your choice, just click the "select" button in the form.
Open the form and change the default color if you want. Click Modify.
From the filled form, click the "@" link. It opens a braced.io enginesheet editing page.
Update whatever you want, even you can change the name.The connection is linked by UUID.
Then click Save. The connection will be marked as modified in Tekla. Now you can reload from Tekla and it will be autoupdated.