How to use Energy monitoring kit

Hello I’m completely new to the community so please excuse my question if it is too newbieish. I need help with using my new cayenne energy monitoring kit.

I have installed my raspberry pi to the kit and installed my devices. What I’m trying to do next is attach an AC power source and take the positive wire from the source via one of the black channels on the current monitor. Next I connect an LED to the + and - end of the wire (- being sourced from outside and not via the other channel). The LED lights up.

Now when I try to add the widget, I’m not able to find the right one at all. I just want a widget displaying how much current is flowing. The kit that I bought has been mentioned above. Please Help!