I just got the DIY connectors for HD650 by Cardas on ebay. I noticed that one side of the connector has an exposed side so that the wires can be soldered to them. However, there's no cap/covering to cover the exposed wires... should it be like this?

They are exposed like the black one in this picture. I was expecting some sort of plastic cap/covering.
They are exposed like the black one in this picture. I was expecting some sort of plastic cap/covering.








