What’s that pump?

I’m probably thinking too much about it again, but what’s that in the picture for a pump? I bought my thick one last weekend and the salesman said it was changed because there were problems there. Today I look, actually after the wash water and see that the pump is not connected at all. So in the system is integrated, hose moderately yes. But the plug hangs loose around and the matching counter plug hangs right next to it. If it is my first Volvo, have I can’t find out what’s funny to me.