Replaced gasket now I can't find what was plugged...

Question

My Lavazza had been leaking when I used it. I followed the instuctions on another post and I took out the heating element, and replaced the gasket. I put it all back together and now I can't figure out what was pluged into the lower right hand side, backside of the heater. There is a prong sticking out of both the right and left side of the machine. I have everything else plugged into what seems to be right and there is nothing extra. I am either missing somthing or I have something plugged in wrong. I am guessing I have something plugged in wrong. I have double checked everything. I am pretty good with fixing things so this is driving me crazy. I have learned to take pictures for the next time. If someone can send me a picture or a link to a diagram I would be very thankful.