Solved Fan on bottom of Robo R-1

I took the bottom off my Robo R-1 (new user) and the bottom fan unplugged from the controller and I cant tell where to reconnect it. Can someone help.

 

Thanks that resolved it but now I have a major problem. I was installing an external smart LCD controller. It worked but I didnt' like it so much so I took it out. But now when I run the printer I am half way up the Z axis for the home position. I even does the auto leveling routine at the midway point of the z axis. What happened and how do I get it back to normal?

 

red wire goes on the top pin of that red (purplish) hand drawn square.

 

check your z endstops. They might not have the x axis endcaps sitting on them correctly so then the printer thinks you are at the bottom of the printer.