Apologies for the late reply and the hurried one now. I have uploaded a few photos of the connector I mean I will have a good look over the weekend and report back. Here is a link to the photo. I just assumed it must be plugged into something.
Maybe they have wired it differently. What led me to believe there is an issue is that I was sure that when the car was running coolant would come out the little hole top left of the tank and recirculate, is that not the case.
https://goo.gl/photos/kb36iZZkfQ4ty39Y8.