While "anslutningskonor" literally means "connection cones," you can also visually confirm that this is likely to be the right term. The two web references I included consist of the results of a Google Image search for the English term "connection cones" (in quotes), and a link to a technical PDF in Swedish, with pictures. Go to the top of page 5 of that PDF, and you'll find your "anslutningskon." Compare that picture with the pictures for the "connection cones" image search :)

A web search of "connection cones" shows that this is a term that is used, and that it has a somewhat general application, it refers to whatever specially-made cones are being used as connectors for some kind of mechanical device.