Delete existing cloud connection in AEP

hi,

1. I have an existing Connection under source, since option to delete that connection in not available  in UI, how can we delete any existing connection ? (Fig1)
2. How to delete any a  folder under a connection and retain other folders, Need to backup(fig2)

Couldn't find any related explanation under  "Source Connectors Guide" https://experienceleague.adobe.com/docs/experience-platform/sources/home.html?lang=enin 

Fig1:

Fig2:

Thanks,
Sandeep