Fuel Leak from quick connect on fuel pump

[long2jump]

I had to pull my fuel tank down to repair a small leak. After putting the tank back and trying to start the truck I now have a bigger leak coming from the quick connect fitting on the fuel pump. Is there an o-ring in there that had come out? or Does the clip need to be installed on the quick connect, though it was not there when I pulled the tank down. Pictures are attached, please help.