It's easy enough to add the heading of "Connections", but adding the actual connection is not intuitive, since the links (small plus and minus) signs) are not visible until one hovers over that particular area with the mouse pointer.

I fiddled around with the Connection link for 5 minutes, before my pointer rested over that area of the page long enough to see the small plus and minus signs.

The same is true for deleting a connection. User won't see the delete link until and unless they happen to hover their cursor pointer just over the end of the connected item.

I suggest that the links be visible, even if they are grayed out until the cursor is positioned over them.